At 01:30:00 (UTC) on 06 January 2016 the CTBTO's monitoring stations picked up an unusual seismic event in the Democratic People’s Republic of Korea (DPRK). The location and magnitude is similar to the event our system registered on 12 February 2013. Our initial location estimate shows that the event took place in the area of the DPRK’s nuclear test site. The following analysis confirmed that the event was a man-made explosion. The DPRK also claimed on 6 January that it has conducted yet another nuclear test, the fourth since 2006.

Latest Technical Findings


07 January 2016

Update on the seismic event detected in North Korea with ES Lassina Zerbo.



06 January 2016

UN New York press briefing with ES Lassina Zerbo via video link

06 January 2016

Press Stakeout with Randy Bell, CTBTO's Director of the International Data Centre.

Special meeting of CTBTO Member States

A special meeting of the CTBTO's highest decision-making body, the Preparatory Commission, on 7 January 2016 was informed of the latest technical findings. Member States stated their concern over the announced nuclear test and stressed the importance of the early entry into force of the CTBT.

Report of the 45th Session of the Preparatory Commission (PDF)