Site Map
- About
- The Treaty
- Treaty Text
- Status of signature and ratification
- History: Summary
- History: 1945-1993
- 1993-1996: Treaty negotiations
- Developments after 1996
- 1996-97: Creating a CTBTO Preparatory Commission
- 1998: Emerging nuclear armed states
- 1999-2002: The United States and the CTBT
- 1999-2004: CTBT's expanding role
- 2005-07: Continued challenges for nuclear arms control
- Interview: Jaap Ramaker, chairman of the CTBT negotiations in 1996
- 2009 DPRK Announced Nuclear Test
- 2013 DPRK Announced Nuclear Test
- 2016 DPRK Announced Nuclear Test
- 2016 Sept DPRK Announced Nuclear Test
- 2017 Sept DPRK
- Article XIV Conferences
- CTBT Ministerial Meetings
- International Day against Nuclear Tests
- Legal Resources
- Country Profiles
- Nuclear Testing
- The Organization
- CTBTO Preparatory Commission
- The Provisional Technical Secretariat (PTS)
- Working at the Provisional Technical Secretariat
- Geographical and gender distribution
- Budget
- Special events, civil and scientific applications and symposia
- Organizational structure of the PTS
- Curriculum Vitae: Zeinabou Mindaoudou Souley, International Data Centre
- Curriculum Vitae: Junan Zhang, Legal and External Relations Division
- Curriculum Vitae: Deepti Choubey, Knowledge Management and Human Resources Services
- Curriculum Vitae: Vadim Smirnov On-site Inspection Division
- Curriculum Vitae: Nurcan Meral Özel
- Curriculum Vitae: Patrick Grenard Division of Administration
- Curriculum Vitae: Lassina Zerbo Executive Secretary
- CTBTO after entry into force
- Workshops, Training and Exercises
- Background Information
- Archive: Previous Workshops, Training and Exercises
- Previous international cooperation workshops (selection)
- CTBTO enhances cooperation with Pacific States
- Comprehensive Nuclear Test-Ban-Treaty (CTBT) plays key role in nuclear non-proliferation and disarmament
- Importance of CTBT ratification discussed at international cooperation workshop for States from the Pacific
- The Bahamas ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Palau announces CTBT Ratification at Manila Workshop
- A CTBTO international cooperation workshop for ECOWAS Member States was held in Abuja, Nigeria
- Republic of Korea hosts Regional Workshop on CTBTO International Cooperation
- Guatemala hosts Regional Workshop on CTBTO International Cooperation
- CTBTO Preparatory Commission holds a seminar on the CTBT in Tlatelolco, Mexico
- Expert Follow-up Meeting on CTBT Work for States from Central Asia is held in Baku, Azerbaijan
- Three-day CTBTO International Cooporation Workshop for States of Southern Africa is held in Pretoria
- Workshop on CTBTO International Cooperation for States from Northern Africa
- Regional Workshop on CTBTO International Cooperation for States from South East Asia held in Malaysia
- Workshop on CTBTO International Cooperation and National Implementation of the Treaty for States in the Pacific concludes
- Workshop on CTBTO International Cooperation and National Implementation of the Treaty for States in the Pacific
- CTBTO international cooperation workshop in Baku concludes
- CTBTO Workshop in Jamaica promotes cooperation at the regional level
- Workshop on International Cooperation and National Implementation in Jamaica
- International cooperation workshop opens in Jamaica
- Workshop on CTBTO International Cooperation and National Implementation
- International Cooperation sub-regional Workshop in Dakar, Senegal
- Interregional workshop for CTBTO International Cooperation and National Implementation/Ratification Procedures
- Workshop to focus on cooperation in advancing work on the Comprehensive Nuclear-Test-Ban Treaty, Beijing, 6-8 June 2000
- Previous technical
workshops (selection)
- Monitoring Station Operators from all over the world gather in Vienna
- Integrated Field Exercise 2008 concludes successfully
- CTBTO on-site inspection simulation completes first phase
- Final preparations for major CTBT inspection exercise
- CTBTO prepares for large on-site inspection exercise
- Testing seismic aftershock measurements at "Ore Mountain" in Sweden
- Hungary hosts fourth Experts' Meeting on civil and scientific application of CTBT verification technologies
- CTBTO Preparatory Commission holds two-day scientific symposium
- CTBTO to hold Scientific Symposium from 31 August - 01 September 2006
- Introductory Training for Station Operators and National Data Centres Managers is held in Vienna
- CTBT Operations and Maintenance Workshop and certification ceremony held in Baden, Austria
- Field exercise to test aftershock equipment deployment is hosted by the Government of Slovakia
- Radionuclide Laboratory Workshop and a Noble Gas Workshop organized by the PTS takes place in Italy
- On-Site Inspection Equipment Testing and Curriculum Development Activity
- Evaluation Workshop held in Amman, Jordan
- Annual joint Global Communications/Evaluation workshop takes place in Vienna
- The CTBTO and the Government of Hungary organised an Experts’ Discussion in Sopron, Hungary
- Ninth on-site inspection workshop held in Hiroshima, Japan
- CTBTO conducts Third On-Site Inspection Experimental Advanced Course
- Seminar on potential civil and scientific applications of CTBT verification technologies
- Eighth On-Site Inspection Workshop Held in Vienna
- Senior Experts' Discussion on Civil and Scientific Applications of CTBT Verification Technologies
- Evaluation Workshop held in Oslo, Norway
- Government of Slovakia hosts On-Site Inspection Field Experiment and Equipment Testing Exercise
- Calendar of Events
- Science and Technology - The Conference Series
- Documents
- Member States
- Verification Regime
- Information Centre
- News Stories
- 2021
- Hybrid/virtual SnT2021 conference sees record attendance
- CTBT SnT2021: marking 25 years and innovating for the future
- Zerbo awarded title of Executive Secretary Emeritus
- Rob Floyd elected as next CTBTO Executive Secretary
- 10 years on from Japan’s triple tragedy: CTBTO and disaster risks
- Comoros becomes 170th state to ratify the CTBT
- Cuba joins the Comprehensive Nuclear-Test-Ban Treaty
- “Strengthening the CTBT”: high-level speakers reaffirm Treaty’s key role
- Costa Rica's Path to Peace: Putting an End to Nuclear Explosions
- 2020
- New tsunami warning agreement signed with Chile
- France becomes first Nuclear Weapons State to complete its IMS segment
- UNGA reaffirms UN-CTBTO cooperation
- CTBTO hosts discussion on CTBT/NPT linkages
- Webinar: The CTBT and NPT 6 October 2020
- “Friends of the CTBT” group issues video call for Treaty’s entry into force
- CTBTO launches presidential initiative: CTBT Champions for a Nuclear-Test-Free World
- Minute Earth video explains the “SOFAR” channel, that CTBTO uses to listen for underwater nuclear tests.
- International Day Against Nuclear Tests 2020
- New edition of CTBTO Spectrum out now!
- ES Zerbo on 75th Anniversary of Atomic Bombings of Hiroshima & Nagasaki
- Remembering Trinity, the world’s first nuclear test
- World Ocean Day - Protecting Oceans 365 days a Year
- CTBTO holds virtual WGA policy meeting in all UN languages
- CTBTO PROVIDES COVID-19 PPE FOR AFGHANISTAN AND ECUADOR
- PPE donations arrive in Burkina Faso, Paraguay
- CTBTO staff start gradual return to Vienna HQ
- Watch: UN family in Vienna responds to the #COVID19 crisis
- New 'Minute Earth' monsoon video features CTBT data
- CTBTO opens PPE stocks to help fight COVID-19
- Video: Against all obstacles - Niger radionuclide station certified
- CTBTO to launch building of IMS stations in Central African Republic
- COVID-19: CTBTO staff work remotely, core mission maintained
- COVID-19: Joint statement by the main Vienna-based UN organizations
- Future of diplomacy discussed at Munich Security Conference
- 2019
- CTBT verification system hits 300 certified facilities!
- Practice makes perfect: preparing for on-site inspections
- CTBTO tests on-site inspection response in major exercise
- 20 years after ratifying, Switzerland celebrates CTBT as unique model
- Diplomats Visit Nuclear Test Monitoring Stations in Bavarian Forest
- Non-Aligned Movement Stresses Significance of Universal Adherence to CTBT
- Executive Secretary inaugurates Science Diplomacy events in Cuba and in the Dominican Republic
- Around 85 nations rally to promote CTBT at Article XIV Conference
- Multilateral diplomacy is ‘irreplaceable’ despite tensions – IPI panel
- New tsunami warning agreement with Italy
- Urgent calls for CTBT Entry Into Force at United Nations General Assembly High-Level Meeting
- International Day Against Nuclear Tests 2019
- Joint Statement: Executive Secretary Zerbo and Kazakh Foreign Minister Beibut Atamkulov on International Day against Nuclear Tests
- Watch: SnT219 video impressions
- Remembering the atomic bomb victims of Hiroshima and Nagasaki
- Executive Secretary Lassina Zerbo's Statement at Conference on Disarmament (PDF)
- Engaging Francophone parliamentarians to support the CTBT
- Engager les parlementaires francophones en faveur du TICE
- How to Find a Nuclear Test?
- “Unsung hero” tends CTBT station deep in Finnish forest
- Group of Eminent Persons stresses role of CTBT in non-proliferation and disarmament
- Science, technology, policy and much more at CTBTO’s biggest ever SnT Conference
- Executive Secretary’s opening statement to the CTBT: Science and Technology 2019 Conference
- Watch the opening of our new CTBTO TeST Centre
- Engaging African States to Promote the CTBT
- Malta Explores Possible Tsunami Agreement with CTBTO Head
- New Tsunami warning agreement with Madagascar
- Watch live: CTBTO side event on DPRK at the NPT Prepcom
- Executive Secretary’s statement to 3rd NPT "PrepCom" session
- Video: CTBT data helps detect monsoons
- Men as Champions of Gender Equality: Women's Day 2019 Event
- CTBTO Head Engages Costa Rica & Dominican Republic in Nuclear-Test Ban
- AFCONE special session in Algiers: Enhancing interaction between CTBT and the Pelindaba Treaty
- Francophone Parliamentarians launch campaign for Entry into force of the CTBT
- Promotion de l’entrée en vigueur du TICE : l’APF s’engage
- Nuclear Testing & Munich Security Conference
- Zimbabwe ratifies the CTBT: Events in Harare & New York
- 2018
- Panel Discussion at Tel Aviv University: Israel and the CTBT
- 2018 Year in Review
- German Foreign Office hosts CYG seminar in Berlin
- Advancing CTBT Ratification in Comoros
- Executive Secretary’s state visit to Spain
- CTBT in focus: Australia, New Zealand and the South Pacific
- On-Site Inspection Workshop-24: OSI in different environments and events other than underground
- ES Zerbo participates in the First Meeting of the Paris Peace Forum
- CTBTO Advanced On-Site Inspection Training in South Africa
- Executive Secretary meets with President Putin
- Upcoming Lecture: North Korea the Most Challenging Nuclear Test
- Executive Secretary addresses Bangladesh Institute of International and Strategic Studies
- Executive Secretary Official Visit to Madagascar
- 2018: Ninth Ministerial Meeting on the Friends of the CTBT
- United Nations General Assembly High-Level Meeting Marks International Day Against Nuclear Tests
- Watch the CTBTO Equipment, Storage and Maintenance Facility (ESMF) being built
- International Day Against Nuclear Tests 2018
- Message from CTBTO Executive Secretary Zerbo for the International Day Against Nuclear Tests
- ROK Foreign Minister & CTBTO Head Discuss Situation on Korean Peninsula
- CTBTO Executive Secretary honours victims of Hiroshima & Nagasaki bombing
- Executive Secretary Official Visit to Canada
- 2018 Meetings of the Legal Advisors of the United Nations
- Joint appeal by Minister for Foreign Affairs of Japan, Taro Kono and CTBTO Executive Secretary Lassina Zerbo
- CTBTO visit to Pakistan
- Africa day celebration
- 2nd CTBT Science Diplomacy Symposium
- High Level CTBT meeting, Egmont Institute, Brussels
- Executive Secretary Official Visit to Cyprus
- “Effective Multilateralism in a globalized world – The case of Europe and Asia Pacific” Lassina Zerbo keynote
- Remembering the past, looking forward to the future
- CTBTO National Data Centre Workshop in Algiers
- Science Editorial: Backing up nuclear disarmament by Lassina Zerbo
- CTBTO at the 2018 NPT PrepCom
- European Union champions the CTBTO - Voluntary Contribution of over 4.5 mio EUR
- VIDEO: Press Briefing on DPRK announcement to halt nuclear testing and dismantle test site
- Executive Secretary Lassina Zerbo statement to NPT2020 PrepCom, Geneva
- Regional On-site Inspection Course held in Argentina
- International Convention on Science, Technology and Innovation, Cuba
- Executive Secretary addresses Conference on Disarmament
- February, the month of CTBTO-OSCE cooperation on disarmament and non-proliferation
- African regional infrasound workshop for National Data Centres
- Lassina Zerbo wins 2018 AAAS Award for Science Diplomacy
- Remarkable progress: China and the CTBT
- Ground-breaking ceremony for the permanent Equipment, Storage & Maintenance Facility (ESMF) in Seibersdorf
- Transportable radioxenon systems (TXLs) enhance the CTBTO’s radionuclide monitoring technology in Japan
- 2017
- Analysis of DPRK announced nuclear test and monsoon early warning among topics presented at AGU 2017
- 2017: Four more IMS stations certified in China
- Executive Secretary Lassina Zerbo visit to France 11-14 December 2017
- CTBTO hydroacoustic data used to aid search for missing submarine ARA San Juan
- Namibia Capacity-Building Workshop
- World Science Forum 2017, Jordan - Science for Peace
- Video: Watch our team install HA04, Crozet Islands
- On-Site Inspection Table-Top Exercise
- CTBTO Youth Group Conference Moscow
- CTBTO Executive Secretary Lassina Zerbo travels to Russia
- Tenth Conference to advance CTBT Entry Into Force held at the United Nations
- Op-Ed: Why prohibiting nuclear testing matters, and what we can do about it
- Two-day CTBT-immersion of 2017 UN disarmament fellows
- Executive Secretary Lassina Zerbo participates in Bled Strategic Forum
- International Day Against Nuclear Tests
- CTBTO Executive Secretary Lassina Zerbo travels to Japan for Peace Memorial ceremonies in Hiroshima and Nagasaki
- CTBTO Executive Secretary Lassina Zerbo receives Special Honorary Citizenship of Hiroshima
- Video: Japan National Press Club (JNPC) Press Conference with ES Zerbo (Tokyo)
- Science and Technology Conference 2017 - Hofburg Palace, Vienna, Austria
- Inauguration of Infrasound Station IS20 in Galápagos
- Zerbo joins Gender Champions Initiative
- NATO Conference on WMD Arms Control, Disarmament and Non-proliferation
- Intensive ‘hands-on’ Training for the On-Site Inspection Third Training Cycle Participants
- On Africa Day, CTBTO Executive Secretary Lassina Zerbo pays tribute to African commitment to nuclear disarmament
- Watch live webcast from Washington of CSIS conversation with CTBTO Executive Secretary
- Enhancing the role of the CTBT in the NPT review process: Side event of NPT PrepCom
- Joint Appeal by Japan, Kazakhstan and CTBTO
- CTBTO Executive Secretary Lassina Zerbo delivers statement to the 2017 NPT PrepCom
- Executive Secretary visits Belarus
- Ctbt discussed at 15th World Congress on public health in Melbourne
- Statement by the Executive Secretary on the occasion of the 20th anniversary of the establishment of the CTBTO PrepCom in Vienna
- International Women's Day
- Japan gives US$ 2.43 Million to boost nuclear test detection
- The CTBT & North Korea Discussed at Munich Security Conference
- Swedish MFA and SIPRI panel discussion on CTBT featuring ES Zerbo and Hans Blix
- Executive Secretary Lassina Zerbo in Mexico for 50th Anniversary of the Treaty of Tlatelolco
- ES Zerbo’s TV interview with France24
- CTBTO Executive Secretary Lassina Zerbo Awarded Presidential Medal of Kazakhstan
- CTBTO Youth Group First Anniversary
- Completing the hydroacoustic network – installation of HA04, Crozet Islands
- France reaffirms strong support for the CTBT
- New Video: Radionuclide Station Galápagos, Ecuador
- 2016
- First station certified in China
- Workshop on the Signatures of Man-Made Isotope Production (WOSMIP VI)
- Ending Nuclear Tests: why should I care? A conversation with youth.
- Washington D.C. Event Highlights International Cooperation in Nuclear Test Monitoring Science
- Event: 6 Dec. Conversation with Youth - Ending Nuclear Tests: Why should I care?
- New Radionuclide Station inaugurated on Galápagos, Ecuador
- On-Site Inspection Introductory Course kicks off third training cycle
- Executive Secretary Official Visit to Cuba
- Keynote by Executive Secretary Zerbo to EU Non-Proliferation & Disarmament Conference 2016
- On-site Inspector Trainees to Receive “First-hand” Training at U.S. Former Nuclear Test Site, Nevada
- United Nations Stamps Issued to Mark CTBT 20th Anniversary
- UN Security Council adopts historical resolution on CTBT
- 24 September: CTBT 20th anniversary
- Eighth Joint Ministerial Meeting
- DPRK Announced Nuclear Test
- CTBTO concludes Facility Agreement with Armenia
- Executive Secretary Zerbo “In the Spotlight” on UN News Centre
- International Day against Nuclear Tests, 29 August
- New Video Series: “20 Years 20 Voices”
- What will the world look like 20 years from now?
- Remembering the Victims of Hiroshima & Nagasaki
- Crossroads -- 20 years on, which way will we go?
- CTBT20 - Special edition online
- European Parliament Foreign Committee briefed on CTBT
- Watch Visual Impressions #CTBT20 Ministerial Meeting
- IAEA & CTBTO Sign Practical Arrangement on Nuclear Emergencies
- Working on the "when" of Israel’s ratification
- Delegations from around the world attend the 20 Years CTBT Ministerial Meeting
- First OSI activity at the former Nevada Test Site
- Time to Finish What We Started, CTBTO Head Tells UN Conference on Disarmament
- The CTBTO and NATO
- CTBT20 Panel with UN Secretary-General Ban Ki-moon
- European Union Council's Political and Security Committee visits the CTBTO
- The CTBTO at the European Geophysical Union General Assembly
- Executive Secretary Lassina Zerbo in Moscow
- Russia Today TV interview with Lassina Zerbo and Hans Blix
- OSI regional introductory training course in South Africa
- CTBTO at the “Long Night of Research"
- Crozet Islands: installing our last hydroacoustic station
- Statement by the President of Russia on the 20th anniversary of the signing of the CTBT
- Lassina Zerbo visits Stanford and Monterey to highlight work of CTBTO
- Building seismic expertise in Africa
- Spreading the word – Pakistani journalists visit the CTBTO
- Joint Statement by Japan and Kazakhstan on the CTBT
- Obama: security of world demands that nations - including U.S. - ratify CTBT
- Training the third generation of on-site inspectors
- The CTBT at 20: Re-Energising the Global Debate – VCDNP panel discussion
- LASSINA ZERBO IN MOROCCO – CTBTO IS UNPARALLELED IN USING SCIENCE TO SERVE DIPLOMACY
- NEW RADIONUCLIDE AND INFRASOUND STATIONS ON GALÁPAGOS ISLANDS
- International Women's Day 2016
- CTBTO Youth Group launched
- Foreign Minister of Turkmenistan at the CTBTO
- [email protected] Symposium concludes
- France reconfirms strong support for the CTBT
- German Foreign Minister reaffirms support for the CTBT
- Tsunami warning agreement with Portugal
- 2016 ACUNS Vienna Annual Conference on peace and security
- Latest technical findings on the DPRK event
- Video: UN New York press briefing with ES Lassina Zerbo
- 2015
- ES Zerbo at Wilton Park
- Kazakh Foreign Minister Erlan Idrissov on the test-ban
- Facility Agreement signed with Turkmenistan
- ES Lassina Zerbo addresses UN-RoK Disarmament Conference
- OSI Regional Introductory Course in Sri Lanka
- Foreign Minister Idrissov of Kazakhstan at the CTBTO
- Using IMS data for climate studies
- Visit to U.S. nuclear labs and former Nevada Test Site
- Cooperation agreement with Slovakia on OSI activities
- Exhibition on Hiroshima and Nagasaki in Vienna
- CTBTO Member States observe minute of silence for victims of terror attacks
- Federica Mogherini on the CTBT
- Prime Minister of Japan & President of Kazakhstan adopt joint statement on the CTBT
- Executive Secretary Lassina Zerbo's address to the UNGA First Committee
- Fifth workshop on ims operation and maintenance, 3 to 9 october 2015
- MinutePhysics “How to Detect a Secret Nuclear Test” Available in Multiple Languages
- Foreign Ministers gather at United Nations to advance CTBT Entry into Force
- Final Declaration adopted at the Conference on Facilitating the Entry into Force of the CTBT
- CTBTO Spectrum Issue 24: September 2015
- 2014 Annual Report now available in all official UN languages.
- UN Disarmament Fellows at the CTBTO
- UN General Assembly marks International Day against Nuclear Tests
- German Foreign Office opens CTBT exhibition
- International Day against Nuclear Tests – Towards a Safer World
- United States Makes Voluntary Contribution in Support of CTBT Verification Regime
- GEM meeting in HIROSHIMA, JAPAN
- 70 years after the bombing of Hiroshima and Nagasaki
- Video: A truly memorable and inspirational SnT2015 Conference
- Niger: Our verification powerhouse in Africa
- Video: Interview with Professor Robin Grimes
- CTBT: Science and Technology for a good cause
- Video: How To Detect A Secret Nuclear Test by Minute Physics
- GEM Meeting in Korea
- SnT2015 kicks off
- 44TH MEETING OF THE PREPARATORY COMMISSION
- Executive Secretary visits Swaziland
- Video: Mitigating Xenon Emissions
- Africa and the CTBTO
- Interview with CTBTO Executive Secretary Lassina Zerbo
- Mitigating Effects of Xenon Emissions
- NPT Review Conference: support for the CTBT voiced over 100 times
- CTBTO Spectrum Issue 23: April 2014
- The CTBT: a Stepping Stone on the road to a nuclear-weapon-free world
- CTBT side event at the NPT Review Conference on 28 April
- CTBTO head meets Pope Francis
- Executive Secretary meets Swedish Foreign Minister
- Executive Secretary Lassina Zerbo in Israel
- On-site inspection workshop in Israel to evaluate IFE14
- The CTBT’s role in the upcoming NPT Review Conference
- Zerbo on CNN
- Desmond Browne and Igor Ivanov receive Nunn-Lugar Award for nuclear security
- CTBT panel at the carnegie nuclear policy conference
- The CTBTO’s contribution to disaster risk reduction
- President Obasanjo visits the CTBTO
- International Women's Day 2015
- NPT Review Conference: P5 statement on mitigating xenon emissions
- Facility agreement with Ecuador concluded
- CTBTO head meets Kazakh Deputy Foreign Minister
- Japan and Kazakhstan to spearhead efforts for banning nuclear testing
- India and the CTBT - Op-Ed
- Message by CTBTO head to World Health Congress in India
- CTBTO head offers condolences on death of first PrepCom Chair
- CTBTO head receives Commander of the National Order of Burkina Faso
- 2014
- Goodbye 2014, hello 2015!
- Interview with GEM member Wolfgang Hoffmann on his recent visit to Pakistan and India
- ES Zerbo on Russia Today: The world is too civilised for nuclear testing
- IFE14: Detecting the smoking gun – how voluntary contributions make a difference
- Russia reaffirms strong support for the CTBT
- Jayantha Dhanapala: Championing a World Free of Nuclear Weapons
- High-level group observes IFE14’s field activities
- The United Arab Emirates and the CTBTO
- Lassina Zerbo: Rebooting Nuclear Security
- Executive Secretary meets with UN Secretary-General Ban Ki-moon
- IFE14 kicks off
- CTBTO and Slovakia agree to strengthen cooperation
- CTBT: Science and Technology Conference, 22-26 June 2015 - web page live
- Infrasound Technology Workshop 2014
- Visit to CTBTO monitoring stations in Bavaria
- Mongolian President to assist with outreach to DPRK, Myanmar
- CTBTO head meets with U.S. Senators Sam Nunn and Richard Lugar
- Executive Secretary meets Secretary of State John Kerry and other world leaders
- Executive Secretary meets former CIA Director Leon Panetta, gives lecture at MIIS
- IFE14 Field Exercise: Ground Control getting ready
- CTBT discussed at Stanford University conference
- Washington D.C.: Conference on "Nuclear Weapons Testing: History, Progress, Challenges"
- CTBT Public Policy Course: Verification through Diplomacy and Science
- CTBTO Spectrum Issue 22: August 2014
- CTBTO head welcomes Federica Mogherini’s appointment as EU High Representative for Foreign Affairs and Security Policy
- Marking the International Day against Nuclear Tests in Vienna
- New infrasound and seismic test-bed and training facility unveiled
- CTBTO head visits Republic of Korea, meets Foreign Minister
- Final training for participants of OSI exercise IFE14 concluded
- ZERO TOLERANCE FOR XENON
- Webpages on IFE14 Field Exercise in Jordan now available in Arabic
- UN High Representative for Disarmament addresses CTBTO Member States
- Japan paves the way for the adoption of future communication technologies
- Armenian President at the CTBTO
- World Environment Day 2014
- Update: CNN report on hydroacoustic signal in connection with MH370 crash
- African Ambassadors discuss CTBT entry into force
- National Data Centre experts share experiences and expertise
- Indonesia hosts two-day regional conference on the CTBT
- CTBTO launches new IT management system
- Second CTBT Academic Forum meets in Vienna
- NPT PrepCom: CTBTO head urges DPRK to refrain from nuclear testing and affirms that no nuclear test will go undetected
- Video: Group of Eminent Persons Stockholm meeting
- Ecuador - breakthrough for Galapagos Islands' stations
- CTBTO Head in Argentina: Meets with Foreign Minister and visits CTBT stations
- Statement by the Group of Eminent Persons, Stockholm, 11 April 2014
- Group of Eminent Persons meets in Sweden to promote the CTBT
- The former President of Nigeria at the CTBTO
- CTBTO head meets with Israel's President Shimon Peres in Vienna
- Welcome back HA03 - Robinson Crusoe Island
- Israel's close cooperation with the CTBTO
- More national data centre experts trained
- CTBTO head gives keynote speech at IPU meeting, meets WMO head
- Researchers encouraged to probe ctbto monitoring data for signs of missing malaysian airlines flight mh370
- Executive Secretary Zerbo visits the United States
- 60 years Castle Bravo nuclear test
- Interview with Ambassador Toshiro OZAWA, Permanent Representative of Japan to the International Organizations in Vienna
- CTBTO head pays first official visit to the United Kingdom
- CTBTO Head at the African Union Summit
- CTBTO head wins "Arms Control Person of the Year" vote
- CTBTO upgrades online services for Member States
- 2013
- NDC Development Workshop in Burkina Faso
- CTBTO head meets French Foreign Minister Laurent Fabius
- CTBTO head nominated for vote on Arms Control Person of the Year
- CTBTO head meets former Secretary of State Condoleezza Rice and technology leaders in Silicon Valley
- Honing Airborne Technique Skills
- Intensive Training for National Data Centre Analysts
- Japan's intense cooperation with the CTBTO
- Angola closer to ratifying the CTBT
- The ATOM Project: Abolish Testing - Our Mission
- CTBTO head visits Moscow, signs tsunami warning agreement
- CTBTO Spectrum Issue 21: September 2013
- CTBTO Executive Secretary Lassina Zerbo opens EU Non-Proliferation Conference
- Group of Eminent Persons (GEM) launched
- Happy Birthday CTBT
- CTBTO Invests in Future Generation of Policy Makers
- Technical training for Chinese station managers
- Voluntary Contribution by the United States
- Stories from the Field no. 3
- New Video: Flexing the Verification Muscle
- CTBT Public Policy Course: Proven Treaty, Political Challenge
- Tibor Tóth looks back on eight years at the CTBTO’s helm
- CTBTO Spectrum Issue 20: July 2013
- VIDEO: CTBT SnT2013. Setting Aims, Achieving Goals
- Fifteen more experts receive training in the use of CTBTO data
- VIDEO: Tóth Awarded ‘Commander’s Cross of the Order of Merit of Hungary’
- Ministerial Briefings at CTBTO Top the Agenda
- Flexing the Verification Muscle
- Anniversary Book
- Medical Isotope Producers and the CTBTO Join Forces to Reduce Radioxenon Emissions
- The Science and Technology Conference 2013
- Zeroing In On Xenon
- The President of Burkina Faso at the CTBTO
- Capacity building course for developing countries
- CTBT Tutorial launched in seven languages
- New Technology Foresight web page and Explorer Tool launched
- Stories from the Field no. 2
- Academic Forum: CTBT Education in the 21st Century
- New noble gas system installed in Vienna
- The "unreasonable" usefulness of CTBTO data for disaster warning and science
- Stories from the Field
- Video Statement by CTBTO head on DPRK announced nuclear test
- One Day on Earth
- International Women’s Day 2013
- Update on CTBTO findings related to the announced nuclear test by North Korea
- 2012
- Record number of countries back CTBT resolution
- Around the Globe and Around the Clock: The Science and Technology of the CTBT
- Exercising Readiness for an On-Site Inspection
- Republic of Korea joins tsunami watch
- The Cuban Missile Crisis and nuclear testing
- Five nuclear test-ban heroes
- Test-Ban Monitoring in the South Pacific - Easter Island's Role
- CTBTO Spectrum Issue 19: September 2012
- Happy Birthday CTBT
- Future Inspectors Test Critical Aspects of On-Site Inspections
- Empowering diplomats, investing in the future
- Upgrading Seismic Stations in YellowKnife, Canada
- International Day against Nuclear Tests 2012
- CTBTO Head Tibor Tóth visits Hiroshima and Nagasaki
- International Day of the World’s Indigenous Peoples 2012
- Intensive Policy Course
- National Data Centre Capacity Building
- Uganda signs Facility Agreement
- Future inspectors practice the basics of radiation protection
- World Environment Day 2012
- Training for auxiliary seismic station operators
- The 2012 NPT Preparatory Committee in Vienna
- How does it all start? Testing the launch phase of an on-site inspection.
- CTBTO launches iTunes U page
- CTBTO Spectrum Issue 18: March 2012
- Monaco makes voluntary contribution
- One year after Fukushima The CTBTO's contributions
- International Women's Day
- CTBT brought closer to entry into force by Indonesia's ratification
- The CTBTO at the Academic Council of the United Nations System (ACUNS) Conference
- 2011
- 2011 - a year of important achievements for the CTBT and the CTBTO
- Advanced Science Course on the CTBT verification technologies
- Interview with Tunisian Ambassador Samir Koubaa
- World leaders welcome Indonesian ratification of the CTBT
- Michael Douglas speaks out in support of CTBT
- Large Indonesian parliamentary delegation visits CTBTO in preparation for ratification
- Istanbul cross-regional workshop on the Comprehensive Nuclear-Test-Ban Treaty
- The CTBTO at the Disarmament Conference in Jeju, Korea
- Next Major Scientific CTBT Conference scheduled for June 2013
- 20th Anniversary of Closure of Semipalatinsk test site
- Russia reaffirms strong support for the CTBT
- Powerful call to the nine remaining CTBT holdouts
- President of Portugal visits IMS station on the Azores
- CTBTO Spectrum Issue 17: September 2011
- CTBT course enjoys worldwide interest
- Large voluntary contribution by the United States
- Strengthening Verification, Enhancing Security: The Science and Political Significance of the CTBT
- International Day against Nuclear Tests 29 August 2011
- One size for all - Niue, among the world's smallest States, may soon re-affirm the CTBT's democratic nature
- 6 and 9 August 1945 Hiroshima / Nagasaki
- Conference to rally support for CTBT's entry into force
- Middle East WMD-free zone support from the CTBT
- The CTBTO at the Organization of Islamic Cooperation
- Verifying the CTBT - an unprecedented technical undertaking
- Special Universalization Outreach Effort
- CTBTO Spectrum Issue 16: May 2011 - New Issue
- The CTBTO at the NAM Ministerial Summit
- The CTBTO and least developed countries
- Disaster risk reduction: The CTBTO's Contribution
- Indonesian Parliamentarians visit CTBTO
- San Diego Operation & Maintenance Workshop
- Fukushima-related measurements by the CTBTO
- Dr David Strangway, former Chief of NASA's Geophysics Branch, will be a keynote speaker at the upcoming S&T conference
- "Security is too important to be left just to men"
- Turkey joins CTBTO tsunami watch
- CTBTO inks agreement with James Martin Centre for Nonproliferation Studies
- Eminent physicist Dr Richard Garwin will be one of the keynote speakers at the S&T 2011 conference in Vienna on 8 June
- Media workshop in Beijing focuses on disarmament education
- The CTBTO's partnership with the Group of 77 continues to grow - CTBTO Executive Secretary Tibor Toth
- Fifteenth anniversary of France's last nuclear test
- Inspection in Jordan
- Waveforms in the snow
- New e-recruitment system launched
- 2010
- Annual Highlights 2010: CTBTO continues to make headway
- CTBT remains the rallying point - CTBTO Executive Secretary Tibor Toth tells the United Nations General Assembly
- France inks agreement with CTBTO to receive tsunami warnings
- The Council of the European Union and the CTBTO sign an agreement.
- The important role of parliamentarians in bringing the CTBT into force
- CTBTO Spectrum Issue 15: November 2010 - New Issue
- Now available: S&T2011 online registration
- Introduction Course on the CTBT
- US Briefed on Developments to Network to Detect Nuclear Explosions
- Fifth Ministerial Meeting to Promote CTBT entry into force Held on Eve of Treaty's 14th Anniversary
- Science and Technology 2011: Call for Papers
- Noble gas detection system reaches maturity
- On the information front
- Vienna Commemoration of Hiroshima and Nagasaki Bombings
- Pacific Islands Forum urges all members to sign and ratify the CTBT
- Listening for Nuclear Noise
- Centre to advocate nuclear disarmament -- proposed by ICNND
- Special Delegation of Indonesian Parliamentarians visits CTBTO as part of process to ratify CTBT
- Listening without sound - CTBTO engineers refine a unique technique
- Creating the "Buy-In" to Strengthen Arms Control and Disarmament
- Strengthened role of the wider scientific community in building test-ban verification
- Banning nuclear explosions protects the environment
- Non-proliferation and disarmament conference reaches consensus
- CTBTO reviews the outcomes of ISS09, offering inspiration for the Science and Technology Conference 2011
- CTBT ratification in the Middle East, Morocco demands at UN event
- CTBT support at NPT conference: A powerful and overwhelming verdict on the part of the international community
- CTBTO Executive Secretary Toth honours memory of former U.S. disarmament negotiator Ledogar
- “Do the right thing: ratify the CTBT!”
- Extensive Support for the CTBT during the first day of the NPT Review Conference
- Making the whole world a nuclear-weapons-free zone
- OSCE is a driving force for disarmament and non-proliferation, Tóth says
- CTBTO Spectrum Issue 14: April 2010
- The Comprehensive Nuclear-Test-Ban Treaty: A global response to today's global challenges
- Watch an interview with CTBTO Head Tibor Tóth on recent nuclear developments.
- The Inter-Parliamentary Union discusses ways to advance the CTBT
- CTBT one of the few areas where a difference can be made in the next years, Toth says
- New Google map features now on the CTBTO website
- The CTBT must come into force as soon as humanly possible, Gareth Evans says in Vienna
- Member States encouraged to promote the CTBT at global and regional meetings
- Video Interview with Professor Gareth Evans on Eliminating Nuclear Threats. Watch it on CTBTO's YouTube Channel.
- CTBTO contributes to tsunami warning following the earthquake in Chile
- Australia and the CTBTO to work together to win support for the Treaty
- Diplomats consider 2010 a Crucial Year for the Non-Proliferation Regime
- The CTBT is Key for Driving Forward the Global Zero Initiative
- Further ratifications needed to increase pressure on remaining holdouts
- CTBTO's Executive Secretary Emphasizes G77 Active Engagement with CTBT Issues
- CTBTO's data processing capabilities increase with overhaul of computer systems and migration to Linux
- Kazakhstan reaffirms commitment towards reducing nuclear threat
- 2009
- Maintaining its pool of analysts: CTBTO completes 11th IDC Analyst Course.
- Build-up of IMS stations in Central Asia continues with completion of installation of PS44
- Association of Southeast Asian Nations Member States called on to ratify CTBT
- The Comprehensive Nuclear-Test- Ban Treaty for Journalists: The Road Ahead
- Near Universal Support for the CTBT at First Committee
- ISS Conference publication is now available online!
- Photos of the Conference to promote the entry into force of the CTBT now available on CTBTO's Flickr photostream
- US Secretary of State Hillary Clinton speaks at the Conference to promote the entry into force of the CTBT
- CTBT: 150 Foreign Ministers adopt final declaration
- Media Information: Unprecedented high-level attention on the CTBT
- Rallying support for the Treaty ahead of next week's conference
- Issue 13: Spectrum 2009 - New issue
- CTBTO images now available on flickr
- New movie on on-site inspections
- Watching over the planet from Vienna
- The Hiroshima and Nagasaki anniversaries
- Non-aligned heads of state call for universal adherence to the CTBT
- New flash animations explain how monitoring technologies work
- Book Launch: “Unfinished Business: The Negotiation of the CTBT and the End of Nuclear Testing”
- Scientific conference assesses CTBT verification capabilities
- Experts Meet to Learn from CTBT Negotiation Process
- Experts sure about nature of the DPRK event
- Homing in on the event
- CTBTO's Initial Findings on the DPRK's 2009 announced nuclear test
- CTBTO enhances cooperation with Pacific States
- CTBT: panacea for the Nuclear Non-Proliferation Treaty
- Importance of CTBT stressed at NPT PrepCom
- Powerful Statement by Council of the European Union in Support of the CTBT
- Fact Sheet: Tremendous progress in the build-up of the CTBT's verification regime
- New Brochure on on-site inspections
- CTBT in the limelight at the Carnegie International Nonproliferation Conference
- Namibia shows its strong support for the CTBT
- Issue 12: April 2009 - New issue
- Major contribution by OPEC to pilot project for the participation of experts from developing countries
- Adapting the CTBTO to current developments
- New book on CTBT: Nuclear Test Ban - Converting Political Visions to Reality
- The CTBT at the Munich Security Conference
- Generate political energy!
- Executive Secretary Tibor Toth: Hoping for a domino effect
- 2008 in retrospect: an eventful year for the CTBT
- 2008
- U.S. nonproliferation community briefed on International Scientific Studies Project
- Monitoring Station Operators from all over the world gather in Vienna
- CTBTO Executive Secretary visits Republic of Korea and Indonesia
- Increasing pressure on the nine CTBT hold-outs at the United Nations
- CTBTO Executive Secretary attends Summit of Organisation internationale de la Francophonie in Quebec City, Canada
- NDC preparedness exercise starts
- CTBT in spotlight at Inter Parliamentary Union Assembly panel discussion
- The Russian Federation's support for the Comprehensive Nuclear-Test-Ban Treaty
- Integrated Field Exercise 2008 concludes successfully
- The 2008 CTBT Ministerial Meeting - A message of hope and peace
- CTBTO on-site inspection simulation completes first phase
- CTBTO expands cooperation with Austria
- CTBTO inspectors implement on-site inspection test scenario in Kazakh steppe
- Head of CTBTO visits Kazakhstan
- Migration of Global Communications Infrastructure complete
- Thousands of experts worldwide working together to enhance test-ban verification
- Comprehensive Nuclear Test-Ban-Treaty (CTBT) plays key role in nuclear non-proliferation and disarmament
- Annual Report now online!
- CTBT discussed by Sweden's Minister for Foreign Affairs and CTBTO's Executive Secretary
- CTBTO's Executive Secretary visits Indonesia where tsunami warning arrangement has just been approved by UNESCO
- Nuclear test ban contributes to protection of environment
- Ten years since India and Pakistan conducted nuclear tests
- Importance of CTBT ratification discussed at international cooperation workshop for States from the Pacific
- Australian Minister for Foreign Affairs meets with Executive Secretary of the CTBTO to discuss promoting the CTBT's entry into force
- The test-ban figures prominently in meeting of the Nuclear Nonproliferation Treaty
- Austrian parliamentary delegation expresses interest in advancing the CTBT issue
- US senior statesmen and others support the entry into force of the CTBT
- Countries in the Americas that have not yet signed and ratified the CTBT are encouraged to do so
- Colombia ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Malaysia ratifies the Comprehensive Nuclear-Test-Ban Treaty
- 2007
- Facility Agreement with Tanzania enters into force
- The Bahamas ratifies the Comprehensive Nuclear-Test-Ban Treaty
- CTBTO prepares for large on-site inspection exercise
- States Signatories approve important CTBTO events and activities for 2008
- Countries are called upon to sign and ratify the Treaty
- The UNSG stresses his full commitment to the CTBT
- Testing seismic aftershock measurements at "Ore Mountain" in Sweden
- Conference concludes with strong expressions of support for the CTBT and urgent calls for its entry into force
- The CTBT verification regime put to the test - the event in the DPRK on 9 October 2006
- CTBTO conducts field exercise in Chernobyl
- Palau ratifies the CTBT
- German radionuclide station turns 50
- Palau announces CTBT Ratification at Manila Workshop
- Braving the storms - constructing hydroacoustic station HA11 at Wake Island
- CTBTO faces budgetary challenges
- National focal points for CTBTO now in 133 States
- PTS Operations Centre fully established in new premises
- CTBT receives strong support at NPT Preparatory Committee
- Tours of the CTBTO and Verification Exhibition in the margins of the NPT PrepCom 2007
- Seventy-Five Percent of Monitoring Stations installed
- Communicating with the South Pole
- UN Office Geneva marks tenth anniversary of PTS
- Provisional Technical Secretariat Marks Tenth Anniversary
- The CTBT and its verification regime discussed in Washington DC, USA
- The Secretary-General of the UN, Mr. Ban Ki-moon meets with the Executive Secretary of the CTBTO Preparatory Commission, Mr. Tibor Tóth
- Working Group on verification issues (Working Group B) concludes it's twenty-eighth session on 16 February 2007
- Latin America and the Caribbean and the CTBT
- The ninth issue of the newsletter CTBTO Spectrum is now available
- Slovakia and CTBTO to strengthen their cooperation on training activities
- The Republic of Moldova ratifies the Comprehensive Nuclear-Test-Ban Treaty: All States in Europe Party to the Treaty
- 2006
- Facility Agreement signed by Russian Federation and the CTBTO Preparatory Commission entered into force
- A CTBTO international cooperation workshop for ECOWAS Member States was held in Abuja, Nigeria
- Cape Verde signs Facility Arrangement
- Cameroon signs Facility Agreement
- Executive Secretary addresses United Nations General Assembly
- 59 Foreign Ministers issue Joint Ministerial Statement in support of CTBT
- Hungary hosts fourth Experts' Meeting on civil and scientific application of CTBT verification technologies
- New exhibition on CTBT verification regime was shown during scientific symposium
- CTBTO Preparatory Commission holds two-day scientific symposium
- Malaysia hosts workshop on national implementation of the Comprehensive Nuclear-Test-Ban Treaty (CTBT)
- Chilean representatives meet with Executive Secretary
- Colombian Vice-Minister for Foreign Affairs meets with Executive Secretary
- Second Vice-President of Costa Rica meets with Executive Secretary
- Vice-President of the Dominican Republic meets with Executive Secretary
- Italy signs Facility Agreement
- Facility Agreement with Senegal enters into force
- Government of Malawi hosts national seminar on CTBT
- Government of Zambia hosts national seminar on CTBT
- Facility Agreement with Paraguay enters into force
- Facility Agreement with Iceland enters into force
- United Nations General Assembly President meets with Executive Secretary
- Visit by the UK Parliamentary Committee on Foreign Affairs
- 2005
- Republic of Korea hosts Regional Workshop on CTBTO International Cooperation
- Iceland signs Facility Agreement
- Guatemala hosts Regional Workshop on CTBTO International Cooperation
- Government of Ethiopia hosts national seminar on CTBT
- Government of the Solomon Islands hosts a national seminar on the CTBT
- Government of the Marshall Islands holds a seminar on the CTBT in the capital Majuro
- Government of Antigua and Barbuda hosts a national seminar on the CTBT on in St. John
- Executive Secretary meets UN Secretary-General in New York
- CTBTO Preparatory Commission holds a seminar on the CTBT in Tlatelolco, Mexico
- Minister of Foreign Affairs and Regional Cooperation of Burkina Faso pays a courtesy visit to the Prep. Commission
- The government of Papua New Guinea hosts a national seminar on the CTBT in Port Moresby
- Introductory Training for Station Operators and National Data Centres Managers is held in Vienna
- National Seminar on the CTBT in Cameroon
- Russian Federation signs Facility Agreement
- CTBTO and Association of Caribbean States sign relationship agreement
- Government of Cape Verde organizes a national seminar on the CTBT in the capital of Cape Verde, Praia
- Two-day national seminar on the CTBT is held in Jakarta, Indonesia
- 2004
- Expert Follow-up Meeting on CTBT Work for States from Central Asia is held in Baku, Azerbaijan
- Three-day CTBTO International Cooporation Workshop for States of Southern Africa is held in Pretoria
- CTBT Operations and Maintenance Workshop and certification ceremony held in Baden, Austria
- Democratic Republic of the Congo ratifies the CTBT bringing the total Annex 2 States to ratify to thirty-three
- 2004 CTBTO Essay Competition: Winner Announced!
- Joint statement in support of the CTBT released by 42 foreign ministers in New York
- National seminar on ratification and the current status of the IMS concluded in Sarajevo
- On-Site Inspection Equipment Testing and Curriculum Development Activity
- Radionuclide Laboratory Workshop and a Noble Gas Workshop organized by the PTS takes place in Italy
- International Data Centre marks the 100,000th event
- DR of Timor-Leste included as a member of the SEAPFE geographical region
- Facility Agreement concluded with Oman
- A Facility Agreement signed by France and the CTBTO Preparatory Commission enters into force
- A mission to Tristan da Cunha: collecting data from the most remote inhabitated location on earth
- Workshop on CTBTO International Cooperation for States from Northern Africa
- Mexico's Minister for Energy visits the Provisional Technical Secretariat
- Norwegian voluntary contribution facilitates information visit
- New web section on workshops and training
- Minister of Environment and Nature of Mongolia visits the PTS
- International Monitoring System station certifications in 2003
- The Experts Communication System
- 2003
- Regional Workshop on CTBTO International Cooperation for States from South East Asia held in Malaysia
- Evaluation Workshop held in Amman, Jordan
- Representative Christopher Shays of the U.S Congress visits to the premises of the PTS
- Panama signs Facility Agreement
- Exhibition on global verification regime technologies during 21st Session of Preparatory Commission
- Annual joint Global Communications/Evaluation workshop takes place in Vienna
- The Executive Secretary addresses the First Committee of the General Assembly
- International Monitoring System Network Management Room
- The Executive Secretary addresses IAEA General Conference
- The CTBTO and the Government of Hungary organised an Experts’ Discussion in Sopron, Hungary
- Executive Secretary visits China and Japan
- Ninth on-site inspection workshop held in Hiroshima, Japan
- Workshop on CTBTO International Cooperation and National Implementation of the Treaty for States in the Pacific
- Romania signs Facility Agreement
- Thirty-third Session of the Organization of American States approves resolution in support of CTBT
- Members of the German Parliament’s subcommittte on the U.N visit the CTBTO
- May 2003 information visit concludes
- Comprehensive Nuclear-Test-Ban Treaty reaches 100 ratifications
- Minister for Disarmament and Arms Control of New Zealand visits the Executive Secretary
- April 2003 information visit concludes
- Philippines signs Facility Agreement
- United Nations General Assembly President visits Executive Secretary
- Paraguay signs Facility Agreement
- CTBTO international cooperation workshop in Baku concludes
- Executive Secretary visits nuclear test site at Novaya Zemlya
- First coordinated CTBTO/WMO experiment on source location estimation 2003
- Provisional Technical Secretariat marks sixth anniversary
- Non-Aligned Movement Conference stresses importance of CTBT
- Whale signals detected by International Monitoring System (IMS) facility
- Hungarian Ambassador visits Executive Secretary
- Ad Hoc Experts Group evaluates CTBTO hydroacoustic data processing
- Slovak Foreign Minister pays courtesy visit to Executive Secretary
- 2002
- Workshop on International Cooperation and National Implementation in Jamaica
- CTBTO Preparatory Commission launches CTBTO Spectrum newsletter
- Facility Agreement concluded with Guatemala
- CTBTO conducts Third On-Site Inspection Experimental Advanced Course
- Facility Agreement concluded with Czech Republic
- CTBTO-WMO, the Way Forward
- Voluntary contribution from the Netherlands supports training activities
- Seminar on potential civil and scientific applications of CTBT verification technologies
- International Data Centre records first event detection by three monitoring technologies
- CTBTO Preparatory Commission and OPANAL sign relationship agreement
- Ministerial Statement on the CTBT issued on the margins of the U.N General Assembly
- Joint ER/IMS mission to Cameroon
- CTBTO and the Pacific Islands Forum in Suva, Fiji Islands
- Eighth On-Site Inspection Workshop Held in Vienna
- Workshop on CTBTO International Cooperation and National Implementation
- New Agreements and Accessions
- National Seminar on the CTBT held in Azerbaijan
- One hundredth satellite earth station installed in IMS
- Evaluation Workshop held in Oslo, Norway
- Senior Experts' Discussion on Civil and Scientific Applications of CTBT Verification Technologies
- Palau signs Facility Agreement
- CTBTO agrees to provide weather data to the World Meterological Organization
- Fifth anniversary of the Secretariat takes place
- Mission to Democratic Republic of Congo
- New look for the web site
- The Provisional Technical Secretariat marks its fifth anniversary
- Two years of distribution of IMS data and IDC products
- Planning underway for 2002 on-site inspection (OSI) field experiment
- The Secretary-General of the U.N, Mr. Kofi Annan, visits the U.N headquarters in Vienna
- 2001
- Six more IMS stations certified
- IMS mission to the most remote inhabited place on earth, Tristan da Cunha
- Two new IMS stations certified in Wyoming and Western Australia
- Kingdom of Netherlands Cash Contribution
- International Cooperation sub-regional Workshop in Dakar, Senegal
- Monitoring stations in Norway and Austria certified
- Government of Slovakia hosts On-Site Inspection Field Experiment and Equipment Testing Exercise
- Monitoring stations in Warramunga and Tahiti certified
- Data Processing at the International Data Centre
- Sixth International Data Centre training course completed
- France signs Facility Agreement
- Minister of Foreign Affairs of Mongolia visits CTBTO Preparatory Commission Headquarters
- Interregional workshop for CTBTO International Cooperation and National Implementation/Ratification Procedures
- First infrasound station to monitor compliance with CTBT is certified
- Peru signs Facility Agreement
- Building Infrasound Station 55 in Windless Blight, Antarctica
- 2021
- Press Releases
- 2021
- 2020
- 2019
- 2018
- Australia Completes its Monitoring Stations in the Global Network to Detect Nuclear Tests: “A remarkable achievement -- the result of a 20 year-long effort”
- Tuvalu signs the Comprehensive Nuclear-Test-Ban Treaty
- Thailand ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Statement by Lassina Zerbo, Executive Secretary, CTBTO, on Pyongyang Joint Declaration of September 2018
- Statement by Lassina Zerbo, Executive Secretary, CTBTO, on the Singapore summit
- Joint Appeal by Mr Didier Reynders, Minister for Foreign Affairs of Belgium, Mr Ibrahim Al-Jafari, Minister for Foreign Affairs of Iraq and Dr Lassina Zerbo, Executive Secretary of the Preparatory Commission for the CTBTO
- Statement by Lassina Zerbo, Executive Secretary, CTBTO, on the Inter-Korean Summit
- Statement by Lassina Zerbo, Executive Secretary, Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO)
- Lassina Zerbo Receives 2018 AAAS Award for Science Diplomacy
- 2017
- 2016
- Message of Executive Secretary Lassina Zerbo on the occasion of the 20th anniversary of the opening for signature of the Comprehensive Nuclear-Test-Ban Treaty
- Press Release - Myanmar ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Press Release - Swaziland ratifies the Comprehensive Nuclear-Test-Ban Treaty
- CTBTO Executive Secretary Lassina Zerbo on the unusual seismic event detected in the Democratic People's Republic of Korea
- STATEMENT BY CHAIRPERSON OF THE PREPARATORY COMMISSION FOR THE CTBTO, AMBASSADOR CRISTIAN ISTRATE, ON UNUSUAL SEISMIC ACTIVITY DETECTED IN THE DEMOCRATIC PEOPLE’S REPUBLIC OF KOREA
- CTBTO Executive Secretary Lassina Zerbo on the unusual seismic event detected in the Democratic People's Republic of Korea on 06 January 2016
- 2015
- EU adopts 3m euro voluntary contribution
- Message on the International Day Against Nuclear Tests (29 August) by CTBTO Executive Secretary Lassina Zerbo
- 20 years since Clinton announced a true zero-yield CTBT
- Statement by CTBTO Head Lassina Zerbo on the Agreement between Iran and the E3/EU +3 group of countries
- Nothing Escapes The Global Ear: Nuclear Tests, Volcanoes, Earthquakes or Meteors
- Angola ratifies the CTBT
- OPCW and CTBTO heads meet to strengthen cooperation
- 2014
- Largest-ever CTBT on-site inspection exercise concludes successfully
- Largest-ever CTBT on-site inspection exercise begins in Jordan
- The Republic of the Congo ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Niue ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Japan makes voluntary contribution in support of the verification regime and GEM
- Chinese monitoring stations now sending data
- 2013
- Jordan to host full-scale CTBT on-site inspection exercise
- CTBTO head welcomes Geneva agreement on Iran’s nuclear programme
- Breakthrough in mitigating radioxenon emissions
- CTBTO head congratulates OPCW for Nobel Peace Prize
- Foreign Ministers call for an end to all nuclear test explosions
- Guinea-Bissau ratifies the Comprehensive Nuclear-Test-Ban Treaty
- China’s Foreign Minister Wang Yi reaffirms commitment to the Comprehensive Nuclear-Test-Ban Treaty (CTBT); progress on CTBTO stations in China
- Executive Secretary Lassina Zerbo takes office, travels to China
- CTBTO detects radioactivity consistent with 12 February announced North Korean nuclear test
- Russian Fireball Largest Ever Detected by CTBTO’s Infrasound Sensors
- CTBTO Executive Secretary Tibor Toth condemns declared North Korean nuclear test
- Chairperson of the CTBTO, Ambassador Jan Petersen, condemns the nuclear test declared by North Korea
- The Republic of Chad ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Brunei Darussalam ratifies the Comprehensive Nuclear-Test-Ban Treaty
- On the CTBTO's detection in North Korea
- Iraq ratifies the Comprehensive Nuclear-Test-Ban Treaty
- 2012
- European union makes voluntary contribution of over five million euros
- Member States elect Lassina Zerbo as new CTBTO head from August 2013
- Foreign Ministers gather in New York to press for ban on nuclear tests, issue joint call
- Turning the spotlight on REYKJAVIK - Why it still matters
- CTBTO launches revamped website
- Niue signs the Comprehensive Nuclear-Test-Ban Treaty
- Head of CTBTO hopes that next step by DPRK will be to join the Comprehensive Nuclear-Test-Ban Treaty
- Japan makes voluntary contribution to CTBTO to enhance tracking of radioactivity
- UN Secretary-General: Proud of 15 Years of Successful Fight Against Nuclear Testing, Urge Entry Into Force of the CTBT
- Press Release - Guatemala ratifies the Comprehensive Nuclear-Test-Ban Treaty (CTBT)
- 2011
- Entry into force of Comprehensive Nuclear-Test-Ban Treaty brought closer by Indonesia's ratification - CTBTO Executive Secretary Tibor Toth
- CTBTO Member States take test-ban verification to the next level
- CTBT needs to be in force to free the world of nuclear weapons
- Urgent calls by international leaders to bring test ban treaty in force
- Guinea ratifies Comprehensive Nuclear-Test-Ban Treaty
- CTBTO Member States appoint two female directors
- Ghana becomes the 154th State to ratify the Comprehensive Nuclear-Test-Ban Treaty
- Science & Technology 2011 Conference kicks off in Vienna
- Media Alert - CTBT: SCIENCE & TECHNOLOGY 2011 CONFERENCE
- International organizations to re-assess nuclear emergency response framework
- CTBTO to share data with IAEA and WHO
- CTBTO contributes to tsunami warning following the devastating earthquake in Japan
- Statement by CTBTO Executive Secretary Tibor Toth welcoming ratification by Russian Parliament of the New START Treaty
- 2010
- Statement by CTBTO Executive Secretary Tibor Toth on approval by the United States of the New START Treaty
- The last few steps to achieving the CTBT's entry into force require "a massive and coordinated grassroots effort" - CTBTO Executive Secretary Tibor Toth
- A decade of "remarkable achievements" in advancing the CTBT, says CTBTO Executive Secretary Tibor Toth
- Exercise to Inspect a Simulated Nuclear Test Site - Jordan, 1 to 12 November 2010
- MEDIA ADVISORY - CTBTO Executive Secretary Tibor Toth to address Parliamentary Assembly of the Mediterranean (PAM) in Rabat, Morocco, 28 October 2010
- MEDIA ADVISORY - Simulated On-Site Inspection of Fictitious Nuclear Test Jordan, 1 to 12 November 2010
- MEDIA ADVISORY-SAVE THE DATE: September 23 For the journalists covering the U.N. General Assembly General Debate, EARLY ENTRY INTO FORCE OF THE Comprehensive Nuclear-Test-Ban Treaty (CTBT)
- Ministerial meeting to urge early entry into force of the CTBT
- MEDIA ADVISORY - Photo Op, 21 September -- US Energy Secretary Stephen Chu and CTBTO Executive Secretary Tibor Toth in the CTBTO Operations Centre
- The International Day against Nuclear Tests: time to bring the Comprehensive Nuclear-Test-Ban Treaty into force
- EU contributes EUR 5 million to strengthen CTBTO verification readiness
- CTBTO Executive Secretary Tibor Toth welcomes the adoption of a final document at the 2010 NPT Review Conference
- MEDIA ADVISORY - New CTBTO test facility to be opened 2 June 2010, at Conrad Observatory, near Vienna
- MEDIA ADVISORY - Press Visit to CTBTO Monitoring Stations in Bavarian Forest 27-28 May 2010
- Media Advisory - Support for Comprehensive Nuclear-Test-Ban Treaty (CTBT) continues to grow with recognition by two more countries
- Indonesia's Foreign Minister announces his country will soon ratify the Comprehensive Nuclear-Test-Ban Treaty
- Tibor Toth, Executive Secretary of the Preparatory Commission for the CTBTO welcomes the announcement by Foreign Minister Marty Natalegawa that Indonesia will soon ratify the Treaty
- World leaders reinforce the importance of CTBT entry into force
- Building Blocks Towards a Successful NPT Review Conference
- CTBTO contributes to tsunami warning following the earthquake in Chile
- CTBTO launches Newsroom for journalists
- Stephen Smith, Australia's Foreign Minister, will encourage other nations in the Asia Pacific to sign up to the Treaty and to ratify it.
- Media Advisory - Photo Opportunity at Meeting Between Australian Foreign Minister and the Executive Secretary of the CTBTO
- Media Advisory - invitation to attend Joint Press Briefing by Australian Foreign Minister and the Executive Secretary of the CTBTO
- UNESCO and CTBTO sign agreement to enhance disaster mitigation efforts and capacity-building in developing countries
- 2009
- CTBTO Executive Secretary Tibor Toth welcomes the report of the International Commission on Nuclear Non-Proliferation and Disarmament
- After Ten-Year "Hiatus" Entry Into Force of Comprehensive Test Ban Treaty an Achievable Goal
- Marshall Islands ratifies Comprehensive Nuclear-Test-Ban Treaty
- To Editors: misconceptions in the media
- Statement by CTBTO Executive Secretary Tibor Toth on the 2009 Nobel Peace Prize to US President Barack Obama
- Trinidad and Tobago signs Comprehensive Nuclear-Test-Ban Treaty
- Media Advisory: On-site inspection experiment on noble gas detection
- Unique Day for Comprehensive Nuclear-Test-Ban Treaty
- International leaders rally in support for entry into force of Comprehensive Nuclear-Test-Ban Treaty
- Saint Vincent and the Grenadines becomes 150th country to have ratified the Comprehensive Nuclear-Test-Ban Treaty
- U.S. Nuclear Security Administrator D'Agostino visits the CTBTO
- France's Foreign Minister Bernard Kouchner and Sweden's Foreign Minister Carl Bildt underline the importance of the entry into force of the Comprehensive Nuclear-Test-Ban Treaty
- CTBT conference – important window of opportunity
- Media advisory on high-level conference to promote comprehensive ban on nuclear testing.
- Media Invitation
- Liberia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Saint Vincent and the Grenadines signs Comprehensive Nuclear-Test-Ban Treaty
- International Scientific Studies Conference Assessing the Capabilities of the Verification Regime
- CTBTO commended for swift reaction to announced DPRK nuclear test
- Invitation to Press Briefing
- Media advisory - invitation to the International Scientific Studies Conference
- Next phase in the analysis of the announced DPRK nuclear test
- CTBT States Signatories meet to consider DPRK announced nuclear test
- CTBTO's Initial Findings on the DPRK's 2009 announced nuclear test
- Statement by Ambassador Peter Shannon, Chairman of the Preparatory Commission for the Comprehensive Nuclear- Test-Ban Treaty Organization for 2009 on the announced DPRK nuclear test
- Statement by Tibor Toth, Executive Secretary of the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization on the announced North Korean nuclear test
- CTBT firmly back on the agenda of the Nuclear Non-Proliferation Treaty's Member States
- CTBT in the limelight at the Carnegie Conference on Nonproliferation
- Michael Douglas: The CTBT is essential
- 2008
- Progress in the Middle East: Lebanon ratifies the Comprehensive Nuclear-Test-Ban Treaty.
- Malawi ratifies the Comprehensive Nuclear-Test-Ban Treaty: ratifications now at 147
- CTBT Member States stand as one for entry into force of the Treaty
- Signing of tsunami warning arrangement with Indonesia
- Mozambique ratifies the Comprehensive Nuclear-Test-Ban Treaty, bringing the total number of ratifications to 146
- Integrated on-site inspection exercise in Kazakhstan reaches a successful conclusion
- Timor-Leste signs CTBT - now 180 States have signed
- Burundi ratifies CTBT
- Leading international figures join foreign ministers in call for treaty banning nuclear weapons testing
- Ministers call upon remaining nine countries to clear way for Nuclear-Test-Ban Treaty
- Media Advisory: Leading international figures will address a conference to promote the Treaty that will ban all nuclear weapons testing on Earth.
- New tsunami arrangements
- CTBTO starts first ever on-site inspection simulation
- Major step forward in detecting nuclear explosions
- Final preparations for major CTBT inspection exercise
- Iraq signs the Comprehensive-Nuclear-Test-Ban Treaty
- Signing of tsunami warning agreement between Japan and the CTBTO
- Media Advisory: CTBTO to conduct first integrated on-site inspection exercise in September in Kazakhstan
- CTBTO will assist additional tsunami warning centres in the Pacific and Indian Oceans
- Launch of international scientific study project to evaluate the nuclear test ban verification system
- The United States pays US$ 23.8 million to the CTBTO
- Ambassador Hans Lundborg, Sweden, new chairperson of the CTBTO Preparatory Commission
- Colombia ratifies the Comprehensive Nuclear-Test-Ban Treaty - only nine more countries need to ratify the Treaty to take effect
- Malaysia ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Barbados ratifies the Comprehensive Nuclear-Test-Ban Treaty
- 2007
- Bahamas ratifies the Comprehensive Nuclear-Test-Ban Treaty
- States Signatories approve important CTBTO events and activities for 2008
- UPDATE: Press briefing on CTBTO on-site inspection training course in Hungary to be held on 30 October 2007
- Press briefing on CTBTO on-site inspection training course in Hungary to be held on 30 October 2007
- One year after the declared nuclear test in DPRK, CTBTO keeps momentum in establishing verification system to monitor nuclear test ban
- Foreign Ministers of Austria and Costa Rica call for US leadership in CTBT ratification process
- Ratifiers and States Signatories urge outstanding States to sign and ratify the Comprehensive Nuclear-Test-Ban Treaty
- CTBT moves world closer to being free of nuclear weapons, says UN Secretary-General
- Representatives of Austria and Costa Rica express optimism about upcoming conference to promote CTBT
- Invitation to press briefing with the Foreign Ministers of Austria and Costa Rica at conference to promote the Comprehensive Nuclear-Test-Ban Treaty
- CTBTO launches updated movie and new web site area on October 2006 announced nuclear test in the DPRK
- Dominican Republic ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Media Advisory: High-level conference to promote an end to nuclear test explosions
- Invitation to press briefing on conference to promote the Comprehensive Nuclear-Test-Ban Treaty
- Palau ratifies the Comprehensive Nuclear-Test-Ban Treaty
- CTBTO faces budgetary challenges
- Number of certified IMS facilities passes 200 mark
- Provisional Technical Secretariat Marks Tenth Anniversary
- The Republic of Moldova ratifies the Comprehensive Nuclear-Test-Ban Treaty: All States in Europe Party to the Treaty
- 2006
- CTBTO Preparatory Commission concludes Twenty-Seventh Session
- The Republic of Montenegro succeeds to the Comprehensive Nuclear-Test-Ban Treaty
- Bosnia and Herzegovina ratifies Comprehensive Nuclear-Test-Ban Treaty
- CTBTO held a Special Session in connection with the announcement of the Democratic People's Republicof Korea to have conducted an underground nuclear test
- Statement by Ambassador Volodymyr Yelchenko, Chairperson of the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization
- Statement by Tibor Toth, Executive Secretary of the Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization
- Statement by Tibor Toth, Executive Secretary of the CTBTO PrepCom
- Statement by Ambassador Volodymyr YELCHENKO, Chairman of the CTBTO Preparatory Commission
- CTBTO Preparatory Commission recommends use of data by tsunami warning organizations
- CTBTO to hold Scientific Symposium from 31 August - 01 September 2006
- Ethiopia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Andorra ratifies Comprehensive Nuclear-Test-Ban Treaty
- Armenia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Italy signs Facility Agreement
- Viet Nam becomes the thirty-fourth Annex 2 State to ratify the Comprehensive Nuclear-Test-Ban Treaty
- Cape Verde ratifies Comprehensive Nuclear-Test-Ban Treaty
- Zambia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Suriname ratifies Comprehensive Nuclear-Test-Ban Treaty
- Cameroon ratifies Comprehensive Nuclear-Test-Ban Treaty
- Antigua and Barbuda ratifies Comprehensive Nuclear-Test-Ban Treaty
- 2005
- The Netherlands Voluntary Contribution to the Preparatory Commission
- Haiti ratifies Comprehensive Nuclear-Test-Ban Treaty
- Preparatory Commission concludes Twenty-Fifth Session
- Ambassador Abdulkadir Bin Rimdap becomes new Chairperson of Working Group A of the Preparatory Commission for the CTBTO
- Madagascar ratifies Comprehensive Nuclear-Test-Ban Treaty
- Vanuatu ratifies Comprehensive Nuclear-Test-Ban Treaty
- Lebanon signs Comprehensive Nuclear-Test-Ban Treaty
- Conference on Facilitating the Entry into Force of the Comprehensive Nuclear-Test-Ban Treaty, New York, 21 to 23 September 2005
- The Conference on Facilitating the Entry into Force of the Comprehensive Nuclear-Test-Ban Treaty
- Cook Islands ratifies Comprehensive Nuclear-Test-Ban Treaty
- Ambassador Tibor Toth becomes new Executive Secretary of the Preparatory Commission for the CTBTO
- United Nations Secretary-General issues invitation to 2005 Conference on Facilitating the Entry into Force of the Comprehensive Nuclear-Test-Ban Treaty
- Djibouti ratifies Comprehensive Nuclear-Test-Ban Treaty
- Thirty-fifth Session of the Organization of American States adopts resolution in support of the Comprehensive Nuclear-Test-Ban Treaty
- Czech Republic supports CTBTO Preparatory Commission's information and training activities
- Czech Republic supports CTBTO Preparatory Commission's outreach activities
- Saint Kitts and Nevis ratifies Comprehensive Nuclear-Test-Ban Treaty
- CTBTO Preparatory Commission holds seminar in Tlatelolco, Mexico
- Minister of Foreign Affairs of Burkina Faso expresses his support for the CTBT
- Russian Federation signs Facility Agreement
- CTBTO signs relationship agreement with Association of Caribbean States
- The Preparatory Commission for the CTBTO holds a special session on a possible contribution to a tsunami warning system
- The Netherland's Voluntary Contribution to the Preparatory Commission
- The Bahamas Signs Comprehensive Nuclear-Test-Ban Treaty
- Northern Sumatra Earthquake and the Subsequent Tsunami on 26 December 2004
- 2004
- Rwanda Signs and Ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Twenty-Third Session of the Preparatory Commission concludes with the election of the new Executive Secretary
- Executive Secretary of CTBTO Preparatory Commission urges States to sign and ratify the Comprehensive Nuclear-Test-Ban Treaty on the occasion of the 59th session of the United Nations General Assembly
- Comprehensive Nuclear-Test-Ban Treaty Operations and Maintenance Workshop opens in Baden, Austria
- Field exercise to test aftershock equipment deployment is hosted by the Government of Slovakia
- United Republic of Tanzania Signs and Ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Democratic Republic of the Congo becomes the latest Annex 2 State to ratify the Comprehensive Nuclear-Test-Ban Treaty
- Eighth anniversary of the opening for signature of the Comprehensive Nuclear- Test-Ban Treaty
- Tunisia Ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Israel signs Facility Agreement
- Liechtenstein Ratifies the Comprehensive Nuclear-Test- Ban Treaty
- Executive Secretary addresses 48th regular session of the International Atomic Energy Agency General Conference
- Kazakhstan signs Facility Agreement
- CTBTO Radionuclide Laboratory Workshop and Noble Gas Workshop to take place in Strassoldo, Italy
- Fourth issue of CTBTO Spectrum published
- Togo Ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Twenty-Second Session of the Preparatory Commission concludes
- Sudan Signs and Ratifies the Comprehensive Nuclear-Test- Ban Treaty
- Serbia and Montenegro ratifies the Comprehensive Nuclear- Test-Ban Treaty
- Seychelles ratifies the Comprehensive Nuclear- Test-Ban Treaty
- Bahrain ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Belize ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Saint Kitts and Nevis Signs Comprehensive Nuclear-Test- Ban Treaty
- Ambassador Yukio Takasu of Japan takes on the role of Chairperson of the CTBTO Preparatory Commission for 2004
- Libya ratifies the Comprehensive Nuclear-Test-Ban Treaty
- 2003
- Panama signs Facility Agreement
- Twenty-First Session of the Preparatory Commission concludes
- Eritrea signs and ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Honduras ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Kyrgyzstan ratifies Comprehensive Nuclear-Test-Ban Treaty
- Mauritania signs Facility Agreement
- Afghanistan signs and ratifies the Comprehensive Nuclear-Test-Ban Treaty on the seventh anniversary of the Treaty's opening for signature
- CONFERENCE REPORT AND FINAL DECLARATION ISSUED
- CONFERENCE CLOSES WITH ADOPTION OF FINAL DECLARATION CALLING FOR UNIVERSAL RATIFICATION OF THE CTBT
- DELEGATES EMPHASIZE THE CTBT'S ROLE IN REINFORCING THE NPT AND REDUCING THE THREATS OF NUCLEAR TERRORISM
- CONFERENCE OPENS IN VIENNA
- DELEGATES CALL FOR STRONG FINAL DECLARATION AS GENERAL DEBATE CONTINUES
- Conference on Facilitating the Entry into Force of the Comprehensive Nuclear-Test-Ban Treaty, Vienna, 3 - 5 September 2003
- Palau Signs Comprehensive Nuclear-Test-Ban Treaty
- CTBTO Preparatory Commission publishes 2nd issue of CTBTO Spectrum
- Cyprus ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Algeria's ratification brings the Comprehensive Nuclear-Test-Ban Treaty closer to entry into force
- Ambassador Thomas Stelzer of Austria elected as Chairperson of Preparatory Commission
- Chinese Minister of Foreign Affairs expresses support for Comprehensive Nuclear-Test-Ban Treaty
- United Nations Secretary-General issues invitation to 2003 Conference on Facilitating the Entry into Force of the Comprehensive Nuclear- Test-Ban Treaty
- On-site inspections workshop opens in Hiroshima
- Foreign Minister of Japan strongly supports the entry into force of the Comprehensive Nuclear- Test-Ban Treaty
- Workshop on CTBTO International Cooperation and National Implementation of the Treaty for States in the Pacific concludes
- Oman ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Romania signs Facility Agreement
- International cooperation workshop to take place in Fiji
- Thirty-third Session of the Organization of American States approves resolution in support of the Comprehensive Nuclear-Test-Ban Treaty
- Conference on Facilitating the Entry into Force of the Comprehensive Nuclear-Test-Ban Treaty to take place in Vienna in September 2003
- Entry into force of Comprehensive Nuclear-Test-Ban Treaty important and urgent, says second session of NPT Preparatory Committee
- Kuwait ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Comprehensive Nuclear-Test-Ban Treaty reaches 100 ratifications
- Mauritania ratifies the Comprehensive Nuclear-Test-Ban Treaty
- Albania ratifies Comprehensive Nuclear-Test-Ban Treaty
- Philippines signs Facility Agreement
- Gambia Signs Comprehensive Nuclear-Test-Ban Treaty
- Paraguay signs Facility Agreement
- CTBTO international cooperation workshop in Baku concludes
- Executive Secretary visits nuclear test site at Novaya Zemlya
- Executive Secretary concludes mission to Brazil and Chile
- Cote d'Ivoire Ratifies Comprehensive Nuclear-Test-Ban Treaty
- Non-Aligned Movement Conference stresses importance of Comprehensive Nuclear-Test-Ban Treaty
- Slovak Foreign Minister pays courtesy visit to Executive Secretary
- 2002
- CTBTO certifies additional International Monitoring System Stations
- CTBTO Workshop in Jamaica promotes cooperation at the regional level
- Facility Agreement concluded with Guatemala
- Executive Secretary visits Central America and the Caribbean
- International cooperation workshop opens in Jamaica
- CTBTO Preparatory Commission launches CTBTO Spectrum newsletter
- Botswana ratifies the Treaty
- Nigerian Foreign Minister pays courtesy visit to Executive Secretary
- Georgia and Samoa ratify the Treaty
- Six years after the Comprehensive Nuclear-Test-Ban Treaty opens for signature, 166 States have signed and 94 have ratified
- Botswana signs the Treaty
- CTBTO Preparatory Commission signs relationship agreement with OPANAL
- Niger ratifies the Treaty
- One hundredth satellite earth station installed in International Monitoring System
- Kazakhstan ratifies Comprehensive Nuclear-Test-Ban Treaty
- Venezuela ratifies Comprehensive Nuclear-Test-Ban Treaty
- Burkina Faso ratifies Comprehensive Nuclear-Test-Ban Treaty
- Provisional Technical Secretariat - Five Years Old
- Background note for the fifth anniversary of the Provisional Technical Secretariat (PTS)
- San Marino ratifies Comprehensive Nuclear-Test-Ban Treaty
- Fifth Anniversary of the Provisional Technical Secretariat of the CTBTO Preparatory Commission
- 2001
- Central African Republic signs Comprehensive Nuclear-Test-Ban Treaty
- Latvia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Cameroon signs Comprehensive Nuclear-Test-Ban Treaty
- Belize signs Comprehensive Nuclear-Test-Ban Treaty
- Jamaica ratifies Comprehensive Nuclear-Test-Ban Treaty
- Libyan Arab Jamahirya signs Comprehensive Nuclear-Test-Ban Treaty
- Ecuador ratifies Comprehensive Nuclear-Test-Ban Treaty
- Nauru ratifies Comprehensive Nuclear-Test-Ban Treaty
- Singapore ratifies Comprehensive Nuclear-Test-Ban Treaty
- New dates for the Conference on Facilitating the Entry into Force of the Comprehensive Nuclear- Test-Ban Treaty
- Paraguay ratifies Comprehensive Nuclear-Test-Ban Treaty
- Costa Rica ratifies Comprehensive Nuclear-Test-Ban Treaty
- Nigeria ratifies Comprehensive Nuclear-Test-Ban Treaty
- Uruguay ratifies Comprehensive Nuclear-Test-Ban Treaty
- The Comprehensive Nuclear-Test-Ban Treaty - five years on
- Sierra Leone ratifies Comprehensive Nuclear-Test-Ban Treaty
- Malta ratifies Comprehensive Nuclear-Test-Ban Treaty
- Holy See ratifies Comprehensive Nuclear-Test-Ban Treaty
- Namibia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Yugoslavia signs Comprehensive Nuclear-Test-Ban Treaty
- Senegal - seventeenth State Signatory to sign Facility Agreement
- Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization launches new web site
- Saint Lucia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Uganda ratifies Comprehensive Nuclear-Test-Ban Treaty
- Peru - sixteenth State Signatory to sign Facility Agreement
- Conference on Facilitating the Entry into Force of the CTBT to be held in September in New York
- Guyana ratifies Comprehensive Nuclear-Test-Ban Treaty
- Croatia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Benin ratifies Comprehensive Nuclear-Test-Ban Treaty
- Ukraine ratifies Comprehensive Nuclear-Test-Ban Treaty
- Philippines ratifies Comprehensive Nuclear-Test-Ban Treaty
- 2000
- New Zealand Facility Arrangements enters into Force
- Republic of Kenya ratifies Comprehensive Nuclear-Test-Ban Treaty
- Republic of Nicaragua ratifies Comprehensive Nuclear-Test-Ban Treaty
- CTBTO Preparatory Commission concludes its Thirteenth Session and adopts budget for 2001
- Kingdom of Cambodia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Lao People's Democratic Republic ratifies Comprehensive Nuclear-Test-Ban Treaty
- Gabon ratifies Comprehensive Nuclear-Test-Ban Treaty
- United Arab Emirates ratifies Comprehensive Nuclear-Test-Ban Treaty
- Comprehensive Nuclear-Test-Ban Treaty - Four Years Old
- Belarus ratifies Comprehensive Nuclear-Test-Ban Treaty
- Spain - Fourteenth State to sign Facility Agreement
- Nigeria, Nauru and Sierra Leone sign Comprehensive Nuclear-Test-Ban Treaty at United Nations Millennium Summit
- Kiribati and Maldives ratify Comprehensive Nuclear-Test-Ban Treaty at United Nations Millennium Summit
- Guyana and Kiribati sign Comprehensive Nuclear-Test-Ban Treaty at United Nations Millennium Summit
- CTBTO Preparatory Commission calls on States to sign and ratify the CTBT during the forthcoming United Nations Millennium Summit
- First Canadian seismological station to monitor compliance with CTBT certified
- First seismological station in the United States to monitor compliance with CTBT certified
- First Norwegian seismological station to monitor compliance with CTBT certified
- Chile ratifies Comprehensive Nuclear-Test-Ban Treaty
- Mexican Foreign Minister, Affirming Support for CTBTO, Calls for World Free of Nuclear Weapons
- Russian Federation ratifies Comprehensive Nuclear-Test-Ban Treaty
- Azerbaijani President in Vienna Calls Nuclear Weapons 'Threat to Mankind'
- Portugal ratifies Comprehensive Nuclear-Test-Ban Treaty
- Iceland ratifies Comprehensive Nuclear-Test-Ban Treaty
- General Assembly approves Relationship Agreement between United Nations and CTBTO Preparatory Commission
- Sri Lanka thirteenth State Signatory to sign Facility Agreement
- Mongolia twelfth State Signatory to sign Facility Agreement
- Workshop to focus on cooperation in advancing work on the Comprehensive Nuclear-Test-Ban Treaty, Beijing, 6-8 June 2000
- The Preparatory Commission and the United Nations conclude an agreement to regulate their relationship
- CTBTO Preparatory Commission welcomes 2000 NPT Review Conference result
- Finland eleventh State Signatory to sign Facility Arrangement
- Morocco ratifies Comprehensive Nuclear-Test-Ban Treaty
- Cook Islands tenth State signatory to have signed Facility Agreement
- CTBT - The Way Forward High-level panel discusses significance and achievements
- The former Yugoslav Republic of Macedonia ratifies Comprehensive Nuclear-Test-Ban Treaty
- CTBTO Preparatory Commission three years old
- Australia ninth member State to sign Facility Agreement
- Bangladesh ratifies Comprehensive Nuclear-Test-Ban Treaty
- Turkey ratifies Comprehensive Nuclear-Test-Ban Treaty
- Lithuania ratifies Comprehensive Nuclear-Test-Ban Treaty
- Daniela Rozgonova appointed Chief of Public Information
- 1999
- Argentina eighth State signatory to have signed Facility Agreement
- CTBTO Preparatory Commission concludes its tenth session and adopts budget for 2000
- United Kingdom seventh State signatory to have signed Facility Agreement
- Jordan sixth State signatory to have signed Facility Agreement
- Kenya fifth State signatory to have signed Facility Agreement
- Romania ratifies Comprehensive Nuclear-Test-Ban Treaty
- Mexico ratifies Comprehensive Nuclear-Test-Ban Treaty
- Bolivia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Statement on the United States Senate vote by Ambassador Mokhtar Reguieg, Chairman of the CTBTO PrepCom
- Switzerland ratifies Comprehensive Nuclear-Test-Ban Treaty
- Statement on the United States Senate vote by Wolfgang Hoffmann, Executive Secretary of the CTBTO PrepCom
- Zimbabwe 155th State to sign the Comprehensive Nuclear-Test-Ban Treaty
- Ukraine fourth Member State to sign Facility Agreement
- Republic of Korea ratifies Comprehensive Nuclear-Test-Ban Treaty
- Bulgaria ratifies Comprehensive Nuclear-Test-Ban Treaty
- Conference on Facilitating the Entry Into Force of the CTBT to be held in Vienna
- Oman 154th State to sign the Comprehensive Nuclear-Test- Ban Treaty
- Guatemala 153rd State to sign the Comprehensive Nuclear-Test-Ban Treaty
- Lesotho ratifies Comprehensive Nuclear-Test-Ban Treaty
- Slovenia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Estonia ratifies Comprehensive Nuclear-Test-Ban Treaty
- Mali ratifies Comprehensive Nuclear-Test-Ban Treaty
- Norway ratifies Comprehensive Nuclear-Test-Ban Treaty
- Ireland ratifies Comprehensive Nuclear-Test-Ban Treaty
- Hungary ratifies Comprehensive Nuclear-Test-Ban Treaty
- Belgium ratifies Comprehensive Nuclear-Test-Ban Treaty
- Senegal ratifies Comprehensive Nuclear-Test-Ban Treaty
- Luxembourg ratifies Comprehensive Nuclear-Test-Ban-Treaty
- Poland ratifies Comprehensive Nuclear-Test-Ban Treaty
- South Africa third Member State to sign Facility Agreement
- Greece ratifies Comprehensive Nuclear-Test-Ban Treaty
- South Africa ratifies Comprehensive Nuclear-Test-Ban Treaty
- Panama ratifies Comprehensive Nuclear-Test-Ban Treaty
- New Zealand ratifies Comprehensive Nuclear-Test-Ban Treaty
- The Netherlands ratifies Comprehensive Nuclear-Test- Ban Treaty
- CTBTO PrepCom two years old
- Azerbaijan ratifies Comprehensive Nuclear-Test-Ban Treaty
- Italy ratifies Comprehensive Nuclear-Test-Ban Treaty
- Finland ratifies Comprehensive Nuclear-Test-Ban Treaty
- Singapore 152nd State to sign the Comprehensive Nuclear-Test-Ban Treaty
- 1998
- Sweden ratifies Comprehensive Nuclear-Test-Ban Treaty
- Argentina ratifies Comprehensive Nuclear-Test-Ban Treaty
- CTBT offers signatory States additional benefits
- Canada first State signatory to have signed Facilities Agreement
- New Zealand second State signatory to have signed Facility Arrangement
- CTBTO Preparatory Commission concludes its seventh session, Budget for 1999 agreed
- The former Yugoslav Republic of Macedonia 151st State to sign the Comprehensive Nuclear- Test-Ban Treaty
- Statement by Wolfgang Hoffmann, Executive Secretary of the Preparatory Commission for the Comprehensive Nuclear-Test- Ban Treaty Organization (CTBTO)
- Second anniversary of adoption of Comprehensive Nuclear-Test-Ban Treaty, CTBTO PrepCom reviews progress
- Comprehensive Nuclear-Test-Ban Treaty training programme in Kazakhstan
- El Salvador ratifies the CTBT
- Contract signed for Global Communications Infrastructure - Another milestone in establishing global verification regime to monitor CTBT
- Grenada ratifies the CTBT
- Germany ratifies the CTBT
- Jordan ratifies the CTBT
- Spain ratifies the CTBT
- Malaysia 150th State to sign the CTBT
- Brazil ratifies the CTBT
- Australia ratifies the CTBT
- Tajikistan ratifies the CTBT
- Statement by Ambassador Affonso Celso de Ouro-Preto, Chairman of the CTBTO PrepCom (Pakistani tests)
- Statement by Wolfgang Hoffmann, Executive Secretary of the CTBTO PrepCom (Pakistani tests)
- Statement by Ambassador Affonso Celso de Ouro-Preto, Chairman of theCTBTO PrepCom (Indian tests)
- Statement by Wolfgang Hoffmann, Executive Secretary of the CTBTO PrepCom (Indian tests)
- France and United Kingdom jointly ratify the CTBT
- PTS reviews first year of operations
- 1997
- 1996
- Media Advisories
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- Media Advisory - Member States re-appoint Lassina Zerbo as CTBTO Head
- Media Advisory - Media Stakeout on DPRK Announced Test
- Media Advisory - On CTBT’s 20th anniversary, EU HR Mogherini, Foreign Ministers meet in Vienna to push for entry into force
- Media Advisory - Media Stakeout: Update on the Seismic Event Detected in North Korea
- Media Advisory - Media Stakeout on Unusual Seismic Event in Korean Peninsula
- Panel discussion with the UN Secretary-General
- 2015
- Media Advisory - United Nations: Foreign Ministers to call for an end to all nuclear testing
- Media Advisory - Group of Eminent Persons gathers in Hiroshima to advance nuclear test-ban
- Media advisory - head of UN nuclear test watchdog to take part in Hiroshima and Nagasaki ceremonies
- Media Advisory – World’s largest scientific forum on nuclear explosion detection
- Media Advisory – Mitigating Xenon Emissions
- 2014
- 2013
- Media Advisory – Press Conference with CTBTO Head Lassina Zerbo in Moscow
- Media Advisory - Foreign Ministers Gather to Outlaw all Nuclear Testing
- Media Advisory - Press Briefing: President of Burkina Faso & CTBTO Executive Secretary-elect, 13 June 2013
- Media Advisory - Opportunities for the media at CTBT: Science and Technology 2013 Conference – 17-18 June
- 2012
- 2011
- Media Advisory - Indonesian Parliament to ratify Comprehensive Nuclear-Test-Ban Treaty on 6 December
- Media Advisory - Turkey and the CTBTO host cross-regional workshop on banning nuclear testing
- Media Advisory - High-level conference to promote ban on all nuclear testing (Update)
- Media Advisory - The CTBTO's laboratory in Seibersdorf celebrates 10th anniversary
- Media Advisory - Launch of the Close the Door on Nuclear Testing Campaign
- Media Advisory - High-level conference to promote ban on all nuclear testing
- Media Advisory - SCIENCE & TECHNOLOGY 2011 CONFERENCE: UPDATE
- Media Advisory - CTBT: SCIENCE & TECHNOLOGY 2011 CONFERENCE
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