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Advancing operations and maintenance: Highlights from CTBTO’s IMS technical meeting

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Member States reappoint Robert Floyd as CTBTO Executive Secretary

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CTBTO detects two earthquakes in northern Iran on 5 October

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Friends of CTBT gather for 11th biennial meeting

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Seismic shift: CTBTO's data key to rapid tsunami alerts, advancing SDG goals

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

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Our Mission

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Ending Nuclear Tests

The Treaty

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States Signatories

Article XIV Conferences

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Lessons learned to action: OSI Workshop-26 gears up for Integrated Field Exercise

Art, peace and sustainability: mural unveiled at Vienna International Centre

Build-Up Exercise 2024: OSI capabilities tested in new terrain

Papua New Guinea ratifies CTBT, advancing Treaty universalisation in Pacific

Venezuela becomes 20th State to sign tsunami warning agreement with CTBTO

Schedule of sessions

Working Group B

Sixty-Fourth Session Of Working Group B

18 Feb 2025 -28 Feb 2025

Advisory Group

Sixty-Fourth Session Of The Advisory Group

05 May 2025 -09 May 2025

Working Group A

Sixty-Seventh Session Of Working Group A

22 May 2025 -23 May 2025

Training and Workshops

Hydroacoustic Training Course For National…

19 Aug -20 Dec 2024

Technical Training Programme For…

10 Dec -12 Dec 2024

Technical Meeting On The Idc Validation And…

08 Apr -10 Apr 2025

Tweets by @CTBTO

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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.

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