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Current Treaty Status

Member States183
Total Ratifications159
Annex 2 Ratifications36
Latest State SignatoryNiue
Latest Ratifying StateChad

Recent News

  • 23 May 2013

    MEDIA ADVISORY – Opportunities for the media at CTBT: Science and Technology 2013 Conference – 17-18 June

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  • 06 May 2013

    “Every cent the EU spends on capacity building is money very well spent.”

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  • 29 Apr 2013

    CTBT Tutorial launched in seven languages

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  • 23 Apr 2013

    CTBTO detects radioactivity consistent with 12 February announced North Korean nuclear test

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  • 17 Apr 2013

    New Technology Foresight web page and Explorer Tool launched

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  • 09 Apr 2013

    “My Journey to Kurchatov” blog by Markus Reiterer

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  • 28 Mar 2013

    Academic Forum: CTBT Education in the 21st Century

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  • 18 Mar 2013

    Sniffing for radioxenon - rooftop station upgraded with noble gas system

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  • 08 Mar 2013

    Happy International Women’s Day!

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  • 26 Feb 2013

    New "Stories from the Field" blog

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  • 18 Feb 2013

    Russian Fireball Largest Ever Detected by CTBTO’s Infrasound Sensors

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  • 17 Feb 2013

    CTBT symposium with Miaki Ishii, Raymond Jeanloz, David Strangway at AAAS.

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Learn more

  • DPRK nuclear tests
  • Disaster warning & science
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  • Calendar of Events

CTBT in the News

Le Burkina s’inscrit en droite ligne dans la stratégie d’actions de l’Organisation du traité d’interdiction complète des essais nucléaires (Burkina Faso Présidence)

SEMICA 2013 : Plus de 300 entreprises représentées, by Grégoire Bazie (Le Faso)

Chinese media: North Korea envoy honors China’s wish by offering to renew nuclear talks (AP, Washington Post)

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