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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 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.
Arrival of the four foreign ministers at the Allied Control Council headquarters building for the signing of the final protocol on 3 June 1972. The Four Power Agreement on Berlin, also known as the Berlin Agreement or the Quadripartite Agreement on Berlin, was agreed on 3 September 1971 by the reconvened Allied Control Council, consisting of ambassadors of the four wartime Allied powers.
Between 1964 and 1994, Los Angeles faced two big earthquakes, which both hit the suburban San Fernando Valley hard: the magnitude 6.6 Sylmar earthquake of 1971, which resulted in 64 deaths; and ...
One of the most destructive events to affect southern California. 65 people were killed and over 2,000 were injured in the 1971 San Fernando earthquake. Extensive property damage was reported with costs $505 million (1971 rate). 65: 2,000 14 [32] [33] [34] Iran, Semnan Province: 5.8: 18.5: VII 1 person died and some damage was caused. 1: 15 [35 ...
The magnitude 4.7 earthquake just north of Malibu on Thursday morning adds to what scientists say is an unusually active year for moderate earthquakes in Southern California. The Malibu earthquake ...
The Pacoima Dam withstood, but was damaged by the very strong (>1 g) ground movement which occurred during both the 1971 San Fernando and 1994 Northridge earthquakes. Because of concerns about the stability of the dam and especially its response to potential future earthquakes, the County of Los Angeles, with the technical support of the USGS ...
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 ...