Rare great earthquake in April triggers large aftershocks all over the globe

Large earthquakes can alter seismicity patterns across the globe in very different ways, according to two new studies by US Geological Survey seismologists. Both studies shed light on more than a decade of debate on the origin and prevalence of remotely triggered earthquakes. Until now, distant but damaging "aftershocks" have not been included in hazard assessments, yet in each study, changes in seismicity were predictable enough to be included in future evaluations of earthquake hazards.

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