We know where the next big earthquakes will happen — but not when

We know where the next big earthquakes will happen — but not when
With Mexico digging out from two deadly earthquakes, here are eight things to know about these seismic events.

http://ift.tt/2xUya1M September 21, 2017 at 10:43PM
via Digg http://ift.tt/2xUya1M