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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 ...
Another notable intraslab earthquake in the Puget Sound region was the magnitude 6.8 2001 Nisqually earthquake. Intraslab earthquakes in Cascadia occur in areas where the subducting plate has high curvature. [13] Much of the seismicity that occurs off the coast of northern California is due to intraplate deformation within the Gorda plate.
The Aleutian Trench, of the southern coast of Alaska and the Aleutian Islands, where the North American plate overrides the Pacific plate, has generated many major earthquakes throughout history, several of which generated Pacific-wide tsunamis, [22] including the 1964 Alaska earthquake; at magnitude 9.1–9.2, it remains the largest recorded ...
Cascadia earthquake sources A scenario of a magnitude 9.0 earthquake on the Cascadia subduction zone by the United States Geological Survey. The geological record reveals that great earthquakes with moment magnitude 8 or higher occur in the Cascadia subduction zone about every 500 years on average, often accompanied by tsunamis. There is ...
Goulet said the USGS analysis suggests there is about a 5% chance that an earthquake greater than magnitude 6.0 could rupture in the area within the next week. “Following a 7, there could be ...
1873 Oregon-California earthquake [2] October 26, 1880: Alaska 7.0 M s 0 [1] August 10, 1884: New York: 4.9–5.5 M fa 2: August 31, 1886: South Carolina: 6.9–7.3 M w 60: 1886 Charleston earthquake: April 19, 1892: California 6.4 M L 1 1892 Vacaville–Winters earthquakes [2] April 21, 1892: California 6.4 M L 0 1892 Vacaville–Winters ...
Having half a dozen earthquakes with a magnitude 2.5 or greater strike in a single week is not a common occurrence in Southern California.
This is a list of earthquakes in 2025. Only earthquakes of magnitude 6 or above are included, unless they result in significant damage and/or casualties. All dates are listed according to UTC time. The maximum intensities are based on the Modified Mercalli intensity scale. Earthquake magnitudes are based on data from the USGS.