events

The 7.9 Mw  Fort Tejon earthquake shakes Central and Southern California with a maximum Mercalli intensity of IX (Violent).

1857 Fort Tejon earthquake

Earthquake in California, United States

The 1857 Fort Tejon earthquake occurred at about 8:20 a.m. on January 9 in central and Southern California. One of the largest recorded earthquakes in the United States, with an estimated moment magnitude of 7.9, it ruptured the southern part of the San Andreas Fault for a…
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Central California

Region of California in the United States

Central California is generally thought of as the middle third of the U.S. state of California, north of Southern California and south of Northern California. It includes the northern portion of the San Joaquin Valley, part of the Central Coast, the central hills of the…
Source: Wikipedia (CC BY-SA)

Southern California

Geographic and cultural region of the US

Southern California is a geographic and cultural region that generally comprises the southern portion of the U.S. state of California. Its densely populated coastal region includes Greater Los Angeles and San Diego County. The region generally contains ten of California's 58…
Source: Wikipedia (CC BY-SA)

Modified Mercalli intensity scale

Seismic intensity scale used to quantify the degree of shaking during earthquakes

The Modified Mercalli intensity scale measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually reported for an earthquake.
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January 9

Day of the year

January 9 is the ninth day of the year in the Gregorian calendar; 356 days remain until the end of the year.
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