On Jan. 6, North Korea conducted its fourth underground nuclear weapons test explosion. The government in Pyongyang claims it conducted a successful test that “scientifically verified the power” of a small hydrogen bomb. The statement claims that the test signifies a “higher stage” of development of North Korea’s nuclear force.
Initial readings from seismic stations in the region, however, strongly suggest the yield of the blast was slightly smaller than the February 2013 nuclear test. According to the Vienna-based Comprehensive Test Ban Treaty Organization (CTBTO), the “initial location estimate” of the seismic activity shows that the event took place in the area of North Korea’s nuclear test site, Punggye-ri, which is located in the northeast of the country. The test has been universally condemned as a threat to international peace and security and a violation of the global taboo against nuclear testing.
Key statements on North Korea's Jan. 6 nuclear test explosion: