By Mark Zastrow
When North Korea detonated its most recent nuclear weapon deep inside its mountain test site, the peak’s flanks heaved up and outwards by a few metres, according to a detailed reconstruction of the event and its aftermath.
The analysis is the first to combine satellite radar images with seismic data to track the effects of the blast on 3 September 2017 at Mount Mantap. It also found that the explosion — which created a seismic disturbance registered at magnitude 6.3 — caused the top of the mountain to sink by about half a metre. The work is published on 10 May in Science1.
“I have mapped surface displacement from many geodynamic processes such as earthquakes, volcano eruptions, landslides, but I have never seen such a large displacement caused by human activity,” says study co-author Teng Wang, a remote-sensing and geodesy researcher at Nanyang Technological University in Singapore.
Continue reading by clicking the name of the source below.