An curved arrow pointing right. The US Geological Survey (USGS) estimates that millions of earthquakes occur every year, but only one of them will be a "great earthquake" — that is, one with a ...
The US Geological Survey (USGS) estimates that millions of earthquakes occur every year, but only one of them will be a "great earthquake" - that is, one with a magnitude of 8.0 or above.
The USGS recorded 446 earthquakes in San Ramon, a suburb of San Francisco in Northern California, from October 14 - 28, 2015 - setting a new record.
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