Scientific American Content | Global Follow North Korea’s nuclear tests have turned this mountain into an earthquake hot spot Seismic activity has increased markedly at Mount Mantap, also known as Mantapsan, since the last test blast there in 2017 https://www.scientificamerican.com/article/north-koreas-nuclear-tests-have-turned-this-mountain-into-an-earthquake-hot-spot/ scientificamerican.com