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The San Jacinto Fault Zone and the San Andreas Fault (SAF) accommodate up to 80% of the slip rate between the North American and Pacific plates.The extreme southern portion of the SAF has experienced two moderate events in historical times, while the SJFZ is one of California's most active fault zones and has repeatedly produced both moderate and large events.
Simplified fault map of southern California The faults of Southern California viewed to the southeast, as modeled by the Southern California Earthquake Center. Highlighted in purple are the San Andreas Fault (left) and Santa Monica Bay complex (right). The foreground is in the Santa Barbara Channel, the east-trending zone marks the Transverse ...
Probabilistic seismic hazard map. 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 ...
The Rose Canyon Fault Zone can produce large earthquakes which can be very destructive due to its proximity to major population centers in Southern California. [8] On the fault, earthquakes nearing magnitude 7 have a recurrence interval between 700±400 [ 24 ] and 2,000 years. [ 23 ]
A map by the California Geological Survey shows faults near the Lake Almanor area in Plumas County, where a magnitude 5.5 earthquake struck Thursday, May 11, 2023, followed by a magnitude 5.2 ...
The Newport–Inglewood-Rose Canyon Fault Zone. The Newport–Inglewood Fault is a right-lateral strike-slip fault [1] in Southern California.The fault extends for 47 mi (76 km) [1] (110 miles if the Rose Canyon segment is included) from Culver City southeast through Inglewood and other coastal communities to Newport Beach at which point the fault extends east-southeast into the Pacific Ocean.
The Elsinore Fault Zone is a large right-lateral strike-slip geological fault structure in Southern California. The fault is part of the trilateral split of the San Andreas Fault system and is one of the largest, though quietest faults in Southern California.
Estimates predict a multi-segment rupture of the fault zone is capable of producing an earthquake of magnitude 7.6–7.9. [6] [3] An earthquake this large in such close proximity to densely-populated southern California would be devastating. [7] In 1986, a M s 5.8 earthquake struck off the coast of Oceanside, killing 1 and injuring 29 more.