USGS/Mapquest A 6.0 magnitude earthquake occurred near American Canyon, CA in Napa County early this morning, causing significant damage to the Bay Area. The event was recorded by the USGS, featured in the map above. The recent earthquake in Napa is the ...

The largest recorded earthquake in United States history was the 1964 Great Alaska earthquake, which struck on March 27, 1964, and registered magnitude 9.2 on the moment magnitude scale, according to the USGS.

A magnitude 7.4 earthquake has struck off the coast of the southern Philippines, killing at least two people and prompting a tsunami warning for the country and some regions of Indonesia, according to local authorities.

SAN BERNARDINO COUNTY, CA - A 3.5 magnitude quake was registered close to Big Bear City Sunday morning, according to the U.S. Geological Survey.

The USGS said on its website following the quake in July: "Following the M8.8 Russian Kamchatka Peninsula Earthquake, the USGS has released new aftershock forecasts that detail the likelihood and magnitude of future earthquakes expected in the region.

Nearly all of the seismic activity since the spring was recorded in the Greenwood County area, where 18 quakes have been confirmed since Aug. 18, SCDNR data shows. The most recent also was the last earthquake recorded in South Carolina this month, a 2.2 magnitude quake in Coronaca on Sept. 26, according to the USGS.

SANTA BARBARA COUNTY, CA - According to the U.S. Geological Survey, a 2.2 magnitude quake occurred close to Goleta Sunday morning.