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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 more
National 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 more
Earthquake 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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