Local emergency agencies say they are monitoring the seismic activity but have not issued any tsunami warnings.
Two earthquakes struck off the Oregon coast on Tuesday, rattling communities along the Pacific Northwest shoreline.
A magnitude 2.7 earthquake rattled parts of central Oklahoma late Tuesday, according to the U.S. Geological Survey.
Mapping out geology across the U.S. is surprisingly difficult, but the USGS has managed just that, and its map is more ...
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