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An earthquake registering 6.6 Mw struck the northern San Fernando Valley near the Los Angeles district of Sylmar, killing 65 people.
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1971 San Fernando earthquake
Earthquake in California
The 1971 San Fernando earthquake occurred in the early morning of February 9 in the foothills of the San Gabriel Mountains in Southern California. The unanticipated thrust earthquake had a magnitude of 6.5 on the Ms scale and 6.6 on the Mw scale, and a maximum Mercalli intensity…Source: Wikipedia (CC BY-SA)
Moment magnitude scale
Measure of earthquake size, in terms of the energy released
The moment magnitude scale is a measure of an earthquake's magnitude based on its seismic moment. Mw was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude/Richter scale (ML ) defined by Charles Francis Richter in 1935, it uses a…Source: Wikipedia (CC BY-SA)
San Fernando Valley
Valley in California, US
The San Fernando Valley, known locally as the Valley, is an urbanized valley in Los Angeles County, California. Situated to the north of the Los Angeles Basin, it comprises a large portion of Los Angeles, the incorporated cities of Burbank, Calabasas, Glendale, Hidden Hills and…Source: Wikipedia (CC BY-SA)
Los Angeles
Most populous city in California, United States
Los Angeles, often referred to by its initials L.A., is the most populous city in the U.S. state of California, and the commercial, financial, and cultural center of Southern California. With an estimated 3.88 million residents within the city limits as of 2024, it is the…Source: Wikipedia (CC BY-SA)
Sylmar, Los Angeles
Suburban neighborhood of Los Angeles, California
Sylmar is a suburban neighborhood in the San Fernando Valley and the northernmost neighborhood within the city of Los Angeles, California, United States. Historically known for its profusion of sylvan olive orchards, Sylmar can trace its past to the 18th century and the founding…Source: Wikipedia (CC BY-SA)