seismology

North Korea’s nuclear tests reactivated dormant faults, triggering nearly 1,400 quakes

Underground nuclear tests at North Korea's Punggye-ri site beneath Mount Mantap have reactivated dormant fault lines, producing nearly 1,400 earthquakes between 2008 and 2025 — with seismic activity continuing to intensify years after the final detonation, according to a study…

AI uncovers hidden fault movements along the San Andreas

A deep-learning algorithm trained on continuous borehole strainmeter data has uncovered dozens of previously undetected slow slip events beneath the Parkfield section of California's San Andreas Fault, according to a study published in Nature Communications. The research demonstrates that these…

Study finds 2011 Tohoku quake’s core-reflected waves shifted all of Japan eastward

The devastating 2011 Tohoku earthquake was so powerful that it sent seismic waves plunging nearly 6,000 kilometers to Earth's iron core and back — and when those waves returned to the surface minutes later, they triggered a massive fault slip…