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Second Quake Jolts San Francisco Bay Area "It was a nice jolt," Coppini said in describing the
quake. Seismologists determined that the second
quake was an aftershock to the earlier
quake, said USGS geophysicist Walter Mooney. AP
Map locates the epicenter of a 3.9 magnitude
earthquake near San
... read moreNational Earthquake Program Blanketing Indiana with seismic stations The study is part of EarthScope, a National Science Foundation program that includes more than 400 portable seismometers that record data used to measure
earthquakes, monitor the behavior of seismic waves,
map movement of the Earth's surface and create
... read moreEarthquake hits south of San Antonio The USGS world
map of
earthquakes shows this is the only
earthquake to have happened Thursday. Many of the North American
earthquakes that happened within the last week popped up in Hawaii and Alaska.
Earthquakes are not common in Texas, and according
... read more
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