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The probability of a serious earthquake on various faults has been estimated in the 2008 Uniform California Earthquake Rupture Forecast. According to the United States Geological Survey, Southern California experiences nearly 10,000 earthquakes every year. [3] Details on specific faults can be found in the USGS Quaternary Fault and Fold Database.
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.
The San Andreas Fault is a continental right-lateral strike-slip transform fault that extends roughly 1,200 kilometers (750 mi) through the U.S. state of California. [1] It forms part of the tectonic boundary between the Pacific plate and the North American plate. Traditionally, for scientific purposes, the fault has been classified into three ...
California Coast, Los Angeles to San Diego Bay. The Elsinore Fault Zone is labeled in the center running along the Santa Ana Mountains. NASA photo, 2008. The Elsinore Fault Zone is a large right-lateral strike-slip geological fault structure in Southern California.
The law requires the California State Geologist to establish regulatory zones (known as Earthquake Fault Zones) around the surface traces of active faults and to issue appropriate maps. ("Earthquake Fault Zones" were called "Special Studies Zones" prior to January 1, 1994.)
The Los Angeles Basin is situated along the coast of Southern California at the confluence of the Transverse Ranges and the Peninsular Ranges.The basin is under the influence of several strike-slip and blind thrust faults with geodetic studies providing evidence of the northern basin being shortened in the north–south or northeast–southwest directions at a rate of 4.5–5 millimetres (0.18 ...
The Los Angeles County Fire Department has provided maps of the thousands of structures, primarily homes, that were damaged or destroyed in the Palisades and Eaton wildfires.
The Whittier Fault is a 40-kilometer (25 mi) right-lateral strike-slip fault that runs along the Chino Hills range between the cities of Chino Hills and Whittier. The fault has a slip rate of 2.5 to 3.0 millimeters (0.098 to 0.118 in) per year. It is estimated that this fault could generate a quake of M w 6.0–7.2 on the moment magnitude scale.