...plutonium was used during underground testing. In addition to the six known tests at Punggye-ri, North Korea also claims to have conducted “subcritical” experiments (stopping just short of a nuclear...Read More
Image: Shutterstock On September 9, 2016, seismic stations around the world picked up the unmistakable signals of another North Korean underground nuclear test in the vicinity of Punggye-ri. The technical...Read More
...the North Korean Nuclear Test Site at Punggye-ri with Insights from the Source Physics Experiment,” Seismological Research Letters 86, no. 4 (2015) [15] US Department of the Interior, US Geological...Read More
* This article was modified by May 1, 2015, updating footnote 12. In 2010, two radionuclide stations in Northeast Asia detected radioactive particles that seemed to indicate that a nuclear...Read More