Science1 hOctober 2, 2026, 19:30

North Korea's Nuclear Test Reactivated Faults Under Mt. Mantap

A study in Science finds seismicity at North Korea's Punggye-ri test site kept rising for years after the 2017 blast instead of decaying. Researchers logged 1,400 seismic events from 2008 to 2025, 955 of them after the test, tied to two reactivated faults.

Popular Mechanics

Open source

North Korea's Nuclear Test Reactivated Faults Under Mt. Mantap

The 2017 M6.3 blast shifted the mountain ~12 feet and sank it ~2 feet
955 of 1,400 recorded seismic events occurred after the 2017 test
Events cluster along two subparallel NNW-trending faults
Rising quake rates point to delayed stress redistribution in the crust

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