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Parkfield earthquake is a name given to various large earthquakes that occurred in the vicinity of the town of Parkfield, California, United States. The San Andreas fault runs through this town, and six successive magnitude 6 earthquakes occurred on the fault at unusually regular intervals, between 12 and 32 years apart (with an average of ...
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 ...
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A small earthquake rattled the Delta region of Northern California. Here’s what you need to know about Sacramento County’s risk.
In 1985, the US Geological Survey predicted that there would be a comparably-sized earthquake in this community by 1993, but no such event came until September 28, 2004, when a 6.0 Mw earthquake struck at 10:15 am Pacific Daylight Time. [5] Parkfield is the most closely observed earthquake zone in the world.
Large earthquakes also occurred near the junction in northern California in previous Decembers, according to the geological survey. There were two, a 6.1 and 6.0, near Petrolia in 2021 and a 6.4 ...
The USGS and the Southern California Earthquake Center in 2005 said that a magnitude 7.5 quake on that fault system, which runs underneath downtown and broad swaths of Southeast L.A. County, the ...
The year 2004 had the most major earthquakes since 1999. In total, there were 16 magnitude 7.0+ earthquakes this year, 6 of them were in Indonesia. The vast majority of the earthquake deaths in 2004 were caused by the magnitude 9.1–9.3 earthquake off the west coast of Sumatra in December.