2012 Sumatra earthquake triggered temblors worldwide for nearly a week, research shows
Wednesday, September 26, 2012 - 12:06
in Earth & Climate
It's known that large quakes trigger smaller quakes hours later as the strong seismic waves pass through the Earth. USGS and UC Berkeley seismologists have now shown that at least some large quakes – strike-slip as opposed to thrust quakes – can trigger distant quakes for up to a week. The strong surface waves from such events appear to prime some faults to break later, though how is unclear.