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The 1971 San Fernando earthquake (also known as the 1971 Sylmar 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 M s scale and 6.6 on the M w scale, and a maximum Mercalli intensity of XI ( Extreme ).
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 documented earthquakes.
The Van Norman Dams, also known as the San Fernando Dams, were the terminus of the Los Angeles Aqueduct, supplying about 80 percent of Los Angeles' water, [5] until they were damaged in the 1971 San Fernando earthquake and were subsequently decommissioned due to the inherent instability of the site and their location directly above heavily populated areas.
Most of the 33 buildings are in the Los Angeles Basin, which has been spared the strongest shaking of L.A. County’s two most destructive earthquakes since World War II — the magnitude 6.6 ...
A magnitude 2.9 earthquake struck underneath the L.A. neighborhood of El ... An average of five earthquakes with magnitudes between 3.0 and 4.0 occur per year in the greater Los Angeles area ...
Measuring M w 6.7, it was the largest earthquake recorded in the Los Angeles area since the 1971 San Fernando earthquake (M w 6.7). However, unlike the Northridge earthquake, the San Fernando shock occurred on a north–northeast dipping thrust fault beneath the San Gabriel Mountains.
The magnitude 4.4 earthquake that rattled Los Angeles on Monday was centered within one of the region's most potentially destructive fault systems, one capable of producing a magnitude 7.5 ...
In February, Los Angeles, ... Deadliest event of 1971. The 1971 Bingöl earthquake caused 1,000 deaths and at least 51 injuries. Property damage was caused with costs ...