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Mexico becomes 23rd country to sign tsunami warning agreement with CTBTO

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Tonga ratifies CTBT, completing Treaty universalisation in Pacific region

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HA08 North repaired: full hydroacoustic coverage achieved, first for IMS

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See. Hear. Detect: CTBTO Science in Action at Long Night of Research

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US nears IMS completion with Antarctic infrasound station

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Our Mission

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Ending Nuclear Tests

The Treaty

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Integrated Field Exercise (IFE26)

30 years of the CTBT

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CTBT marks 30 years as States gather at NPT Review Conference

Statement by Robert Floyd, Executive Secretary of the CTBTO

Namibia to host CTBTO’s Integrated Field Exercise in 2026

Highlights of 2025 voluntary contributions

Verification today, tomorrow, together: Highlights from SnT2025

Schedule of sessions

Advisory Group

Sixty-Seventh Session Of The Advisory Group

08 Sep 2026 -11 Sep 2026

Working Group A

Seventieth Session Of Working Group A

19 Oct 2026 -21 Oct 2026

Preparatory Commission

Sixty-Seventh Session Of The Preparatory…

25 Nov 2026 -27 Nov 2026

Training and Workshops

Technical Training For Station Managers Of…

02 Nov -06 Nov 2026

International Hydroacoustics Workshop 2026

07 Sep -09 Sep 2026

Technical Training For Stations Operators Of…

17 Aug -21 Aug 2026

Executive Secretary

Robert Floyd

Selected Statements

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CTBTO Fact Sheet

International Monitoring System (IMS) Map

Verification Regime Brochure

Civil and Scientific Applications Brochure

On-Site Inspection Brochure

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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.

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