Tuesday, 17 March 2015

Magnitude 3.8 Earthquake in Plumas County, California.

The United States Geological Survey recorded a Magnitude 3.8 Earthquake at the southeastern tip of Lake Almanor in Plumas County, California, slightly after 10.35 pm local time on Monday 16 March 2015 (slightly before 5.35 am on Tuesday 17 March, GMT). There are no reports if any damage or injuries associated with this event, though it was felt across much of northeastern California.

The approximate location of the 16 March 2015 Plumas County Earthquake. Google Maps.

California is extremely prone to Earthquakes due to the presence of the San Andreas Fault, a tectonic plate margin that effectively bisects the state. The west of California, including Santa Barbara and Los Angeles, is located on the Pacific Plate, and is moving to the northwest. The east of California, including Fresno and Bakersfield is on the North American Plate, and is moving to the southeast. The plates do not move smoothly past one-another, but constantly stick together then break apart as the pressure builds up. This has led to a network of smaller faults that criss-cross the state, so that Earthquakes can effectively occur anywhere.

The extent of and movement on the San Andreas Fault. Geology.

Witness accounts of Earthquakes can help geologists to understand these events and the underlying structures that cause them. If you felt this quake (or if you were in the area but did not, which is also useful information) then you can report it to the United States Geological Survey here.

See also...

The United States Geological Survey recorded a Magnitude 4.0 Earthquake at a depth of 7.7 km in northern Mono County, California, slightly before...

The United States Geological Survey recorded a Magnitude 3.8 Earthquake at a depth of 7.8 km in Mineral County in western Nevada, slightly after...

The United States Geological Survey recorded a Magnitude 4.5 Earthquake at a depth of 2.6 km, 6 km to the north of The Geysers in Sonoma County...

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