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Terra Daily
terradaily.com > td-seismologists-already-knew-big-earthquakes-send-waves-down-to-earths-core-and-back-but-japans-2011-quake-was-the-first-time-those-returning-waves-were-shown-to-actually-slip-tectonic-plates-near-th

Seismologists already knew big earthquakes send waves down to Earth's core and back, but Japan's 2011 quake was the first time those returning waves were shown to actually slip tectonic plates near the surface — a previously unrecognised source of seismic hazard.

3+ day, 21+ hour ago   (1170+ words) About 13 minutes after Japan's 2011 magnitude 9.0 earthquake, GPS stations across the country registered a uniform 5–6 millimetre eastward shift with no aftershock to explain it. A 2026 University of Chicago study traced it to a seismic wave that bounced off Earth's outer core…...