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The 1971 San Fernando earthquake (also known as the 1971 Sylmar earthquake) occurred in the early morning of February 9 in the foothills of the San Gabriel Mountains in Southern California. The unanticipated thrust earthquake had a magnitude of 6.5 on the M s scale and 6.6 on the M w scale, and a maximum Mercalli intensity of XI (Extreme).
The earliest known earthquake in the U.S. state of California was documented in 1769 by the Spanish explorers and Catholic missionaries of the Portolá expedition as they traveled northward from San Diego along the Santa Ana River near the present site of Los Angeles. Ship captains and other explorers also documented earthquakes.
The 1994 Northridge earthquake affected the Los Angeles area of California on January 17, 1994, at 04:30:55 PST. The epicenter of the moment magnitude 6.7 ( M w ) blind thrust earthquake was beneath the San Fernando Valley . [ 3 ]
A trio of Southern California earthquakes have struck in the area of Newport Beach and Costa Mesa in the last two days, with a pair rumbling late Thursday afternoon.
The 1992 Landers earthquake occurred on Sunday, June 28 with an epicenter near the town of Landers, California, in San Bernardino County. [5] The shock had a moment magnitude of 7.3 and a maximum Mercalli intensity of IX ( Violent ).
Aftershocks continued Friday after a strong earthquake that prompted a tsunami warning for parts of the U.S. West Coast Thursday. "At this time, there have been 59 earthquakes of magnitude three ...
The magnitude 4.7 earthquake just north of Malibu on Thursday morning adds to what scientists say is an unusually active year for moderate earthquakes in Southern California. The Malibu earthquake ...
The earthquake occurred on the White Wolf Fault near the community of Wheeler Ridge and was the strongest to occur in California since the 1906 San Francisco earthquake. The town of Tehachapi suffered the greatest damage and loss of life from the earthquake, though other locations in Kern County experienced significant damage as well, but its ...