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The 2008 Chino Hills earthquake occurred at 11:42:15 am PDT (18:42:15 UTC) on July 29 in Southern California. The epicenter of the magnitude 5.4 earthquake was in Chino Hills, c. 28 miles (45 km) east-southeast of downtown Los Angeles. Movement on an oblique-slip fault resulted in a maximum Mercalli intensity of VI ( Strong ).
The earthquake was the most powerful earthquake in Southern California since the 2008 Chino Hills earthquake which had a moment magnitude of 5.4. Its epicenter was 1 mi (1.6 km) east of La Habra and its hypocenter was 3.2 mi (5.1 km) deep. Initial reports placed the magnitude at 5.3, however it was later downgraded to magnitude 5.1.
Magnitude of the earthquake and aftershocks. 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 ( Mw) blind thrust earthquake was beneath the San Fernando Valley. [ 3] Lasting approximately 8 seconds and achieving the largest peak ground ...
Seismogram of the earthquake. The earthquake measured 6.4 on the moment magnitude scale, and had a maximum Mercalli intensity of VIII (Severe). It came exactly a year after a 6.2 magnitude earthquake struck onshore in the Cape Mendocino area on December 20, 2021, [7] causing only minor damage. [8]
The 1984 Morgan Hill earthquake (also known as the Halls Valley earthquake) [6] occurred on April 24 at 1:15 p.m. local time in the Santa Clara Valley of Northern California. The shock had a moment magnitude of 6.2 and a maximum Mercalli intensity of VIII ( Severe ). The epicenter was located near Mount Hamilton in the Diablo Range of the ...
A magnitude 4.1 earthquake was reported Wednesday morning at 9:29 a.m. seven miles from Oakley, Calif., according to the U.S. Geological Survey. Magnitude 4.1 earthquake hits Northern California ...
A rupture of a small portion of the Puente Hills thrust fault caused the magnitude 5.9 Whittier Narrows earthquake, which occurred on Oct. 1, 1987, with an epicenter in Rosemead. That earthquake ...
1 killed [5] about 200 injured [6] The 2014 South Napa earthquake occurred in the North San Francisco Bay Area on August 24 at 03:20:44 Pacific Daylight Time. At 6.0 on the moment magnitude scale and with a maximum Mercalli intensity of VIII ( Severe ), the event was the largest in the San Francisco Bay Area since the 1989 Loma Prieta earthquake.