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List of earthquakes in California. 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.
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California, United States has had: (M1.5 or greater) 12 earthquakes in the past 24 hours. 118 earthquakes in the past 7 days. 586 earthquakes in the past 30 days. 7,318 earthquakes in the past 365 days.
Although most of California's quakes are small in magnitude and cause little or no damage, every year the Southern California area alone has about 10,000 earthquakes! Annually, California typically experiences two or three quakes large enough to cause moderate damage to homes or other structures.
California Earthquake Risk Map & Faults By County; List of Notable and Major California Earthquakes; Personal Preparedness
Throughout the world, there are one "great" (magnitude 8.0 or more), 18 "major" (7.0-7.9), 120 "large" (6.0-6.9) and 1,000 "moderate" (5.0-5.9) earthquakes in an average year. Each year, California generally gets two or three earthquakes large enough to cause moderate damage to structures (magnitude 5.5 and higher).
California's earthquake history Below is a list of the historical earthquakes in California, they are listed by month: (All Times are listed in Coordinated Universal (UTC) Time)
A geographical analysis of the major earthquakes that affected California since the turn of the 20th century.
