I'm convinced that's what destroyed Mt. Mantap in NK where the lab was contained that was working on nukes. In Sept. 2017 before Kim was to meet with Trump about denuclearizing.
The findings by the scientists at the University of Science and Technology of China may shed new light on North Korean President Kim Jong Un's announcement that his country was ceasing its testing program ahead of planned summit meetings with South Korean President Moon Jae-in and U.S. President Donald Trump.
I'm convinced that's what destroyed Mt. Mantap in NK where the lab was contained that was working on nukes. In Sept. 2017 before Kim was to meet with Trump about denuclearizing.
https://www.cbsnews.com/news/north-korea-nuclear-test-site-mantapsan-mountain-collapse-unusable-kim-jong-un/