Homepage | CTBTO

Training, tech, Treaty commitments: LAC workshop strengthens regional capacity

Read More

Bolivia leverages CTBT data to launch first-ever seismic design code

Read More

Advancing operations and maintenance: Highlights from IMS' technical meeting

Read More

CTBTO detects two earthquakes in northern Iran on 5 October

Read More

Diving deep: CTBTO data helps discover new pygmy blue whale population

Read More

Our Mission

See all

Ending Nuclear Tests

The Treaty

The Organization

Article XIV Conferences

Science and Technology Conferences

Our Work

Learn More

News and Events

See all

National Data Centres-for-All Initiative

CTBTO installs cutting-edge data system in Yemen, advancing regional capacity

Building Self-Sufficiency in On-site Inspection Operations

CTBTO Signs Facility Agreement with Indonesia

Member States reappoint Robert Floyd as CTBTO Executive Secretary

Schedule of sessions

Working Group B

Sixty-Fifth Session Of Working Group B

26 Aug 2025 -05 Sep 2025

Advisory Group

Sixty-Fifth Session Of The Advisory Group

22 Sep 2025 -25 Sep 2025

Working Group A

Sixty-Eighth Session Of Working Group A

13 Oct 2025 -15 Oct 2025

Training and Workshops

Regional Radionuclide Workshop And…

03 Nov -07 Nov 2025

Training Course On Ndc Capacity Building:…

02 Jun -20 Jun 2025

Technical Meeting On Shi Software Engineering

17 Jun -18 Jun 2025

Tweets by @CTBTO

Resources

Member States

Researchers & Experts

Civil Society

Media

Information Materials

See all

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