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Equatorial Guinea ratifies CTBT, strengthening Treaty support

Dominica ratifies the comprehensive nuclear-test-ban treaty

International Day Against Nuclear Tests

Timor-Leste ratifies CTBT, universalising Treaty in Southeast Asia

Science and Technology Conference 2023 (SnT2023)

Beating Snowstorms, Russia's last primary seismic station is installed

São Tomé and Príncipe becomes 176th country to ratify CTBT

Our Mission

Ending Nuclear Tests

The Treaty

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States Signatories

Article XIV Conferences

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News and Events

CTBTO Head hails Treaty "A Success Story" at NPT Review Conference

Timor-Leste ratifies CTBT, universalising Treaty in South-East Asia

Dominica ratifies CTBT, universalising Treaty in Latin America and the Caribbean

Hiroshima, Nagasaki mayors say CTBT is indispensable for Nuclear-Weapons-Free world

Spain signs tsunami warning agreement

Schedule of Sessions

Advisory Group

Fifty-Ninth Session

27 Sep 2022 -30 Sep 2022

Working Group A

Sixty-Second Session

19 Oct 2022 -21 Oct 2022

Preparatory Commission

Fifty-Ninth Session

21 Nov 2022 -23 Nov 2022

Training and Workshops

2022 National Data Centres (Ndc) Workshop

03 Oct -07 Oct 2022

Virtual Expert Meeting On Advances In…

17 Oct -21 Oct 2022 02:00 pm -05:00 pm

Virtual Expert Meeting On Special Studies On…

17 Oct -21 Oct 2022 02:00 pm -05:00 pm

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Resources

Member States

Researchers & Experts

Civil Society

Media

Information Materials

CTBTO Fact Sheet

International Monitoring System (IMS) Map

Verification Regime Brochure

Civil and Scientific Applications Brochure

On-Site Inspection Brochure

Work With Us

Join CTBTO on our mission to create a world free of nuclear testing. Learn more about employment and business opportunities with the Provisional Technical Secretariat.

Employment Procurement