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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 ...
0–9. 1700 Cascadia earthquake; 1769 earthquake; 1812 San Juan Capistrano earthquake; 1812 Ventura earthquake; 1838 San Andreas earthquake; 1857 Fort Tejon earthquake; 1868 Hayward earthquake; 1872 Owens Valley earthquake; 1892 Laguna Salada earthquake; 1892 Vacaville–Winters earthquakes; 1898 Mare Island earthquake; 1899 San Jacinto earthquake
The largest recorded megathrust earthquake was the 1960 Valdivia earthquake, estimated between magnitudes 9.4–9.6, centered off the coast of Chile along the Peru-Chile Trench, where the Nazca plate subducts under the South American plate. [26] This megathrust region has regularly generated extremely large earthquakes.
On Friday, at 10:26 a.m., a magnitude 3.6 earthquake — down from an original estimate of 3.8 — occurred with an epicenter just north of the Ojai Valley, causing weak shaking to be felt from ...
A map shows California’s tsunami hazard area, which is highlighted in yellow. ... A magnitude 9.2 earthquake in the Gulf of Alaska caused damage and loss of life along the West Coast in 1964 ...
The fault runs offshore along the West Coast from Northern California to northern Vancouver Island in Canada. It is capable of producing magnitude-9.0 earthquakes and tsunami waves about 100 feet ...
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 Range
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 ...