At 00:30 (UTC) on 09 September 2016 an unusual seismic event was detected by the International Monitoring System (IMS). The North Korean state news agency has now announced it conducted its fifth successful nuclear test. The event seems to have been slightly larger than the one the system recorded on 6 January this year and the location is very similar to that event. The initial location estimate shows that the event took place in the area of the DPRK’s nuclear test site.

Latest Technical Findings

Video Statement

09 September 2016

CTBTO Executive Secretary Lassina Zerbo

Remarks, Statements and Report

Remarks by the CTBTO Executive Secretary
Lassina Zerbo (PDF)

Statement by the Chairperson
of the CTBTO PrepCom (PDF)

Secretary-General's remarks at press stakeout,
United Nations, NY (link)

Report of the 46th Session of the Preparatory Commission (PDF)




VIDEO: The Day We Caught a Nuclear Explosion: How CTBTO and Member States experts detected and analyzed the 2013 announced DPRK nuclear test.

A network of over 300 monitoring stations constantly monitors the globe for signs of nuclear explosions. See interactive map and website chapter on how the CTBTO monitors for nuclear tests.