The Project for the CTBT supports the work of NGOs and experts to build public and policymaker understanding of the CTBT.

In 1996, the United States was the first nation to sign the Comprehensive Nuclear Test Ban Treaty (CTBT), which “prohibits any nuclear weapon test explosion or any other nuclear explosion.” The CTBT helps curb the spread of nuclear weapons and establishes a global monitoring network to detect and deter cheating. The time for the CTBT is now.

Project News

CTBTO Certifies Final Hydroacoustic Station

By Samantha Pitz

The Comprehensive Test Ban Treaty Organization released a press release today stating that the CTBTO has successfully certified its eleventh, and final, hydroacoustic station June 19, 2017 on the Crozet Islands (France). The station was installed in December 2016 after many obstacles as part of the International Monitoring System (IMS) network, which monitors 24/7 for nuclear explosions. The relatively low frequency underwater sound produced by a nuclear test can be detected a great distance from their source, requiring only a few hydroacoustic stations around the world. The certification of the Crozet Islands hydroacoustic station brought the IMS network of 337 projected monitoring stations to 90% complete.

DOE's Report Claims "Revolutions" in CTBT-Related Science

By Samantha Pitz

Earlier this week the Los Alamos National Laboratory released a report, “Trends in Nuclear Explosion Monitoring Research and Development -- A Physics Perspective,” assessing current literature relating to explosion monitoring and the Comprehensive Test Ban Treaty (CTBT) for the years 1993 to 2016. The LANL report claims that "there have been significant technological and scientific revolutions in the fields of seismology, acoustics, and radionuclide sciences as they relate to nuclear explosion monitoring" and the CTBT, and also highlights how the CTBT was necessary to universalize monitoring to more than just nuclear states like the United States and diversify the monitoring capacity and abilities.

CTBTO Funding Included in State FY 2018 Budget Request

By Daryl G. Kimball

The Trump administration's State Department budget request for fiscal year 2018 includes full funding for the United States assessed contribution to the Comprehensive Test Ban Treaty Organization (CTBTO), which operates the global monitoring system to detect and deter nuclear explosions and verify compliance with the 1996 Comprehensive Test Ban Treaty (CTBT):

"Contributions to the Comprehensive Nuclear-Test-Ban Treaty Organization’s Preparatory Commission (PrepCom) ($31.0 million): PrepCom assistance helps to fund the fielding, operation, and maintenance of the state-of-the-art International Monitoring System (IMS), a global network of 321 seismic, hydroacoustic, infrasound, and radionuclide sensing stations designed and optimized to detect nuclear explosions worldwide. The U.S. receives the data the IMS provides, which is an important supplement to U.S. National Technical Means to monitor for nuclear explosions (a mission carried out by the U.S. Air Force). A reduction in IMS capability could deprive the U.S. of an irreplaceable source of nuclear explosion monitoring data. [emphasis added] This amount includes funding for projects to increase the effectiveness and efficiency of the Treaty’s verification regime, and also funds a tax reimbursement agreement that facilitates the hiring of Americans by the PrepCom.” (pg. 338)

Japan's Special $2.43 million USD Contribution to the CTBTO

By Samantha Pitz

Japan announced its largest, voluntary contribution of $2.43 million (USD) to the Comprehensive Test Ban Treaty Organization (CTBTO) Feb. 23 to improve the organizaiton's verification capabilities to detect nuclear explosions around the world. CTBTO Executive Secretary Dr. Lassina Zerbo praised the act, telling Permanent Representative of Japan, Ambassador Mitsuru Kitano, “This generous contribution will further build-up the International Monitoring System’s capacity to improve our radionuclide monitoring technology, which can conclusively establish whether a nuclear test explosion has occurred.”

In a May 2 joint appeal by the Japanese Foreign Minister Fumio Kishida, the Minister for Foreign Affairs of Kazakhstan Kairat Abdrakhmanov, and CTBTO Executive Secretary Dr. Lassina Zerbo, Kishida noted that the contribution provided by Japan increases the capabilities of the International Monitoring System (IMS) that was able to detect all five of the North Korean nuclear explosion tests, but in the last two tests, was unable to confirm radionuclide detection, and furthers Japan's desire to universalize the IMS in order to augment detection capabilities all over the world.