That’s because a fault with the provocative name of the Santa Susana thrust exhibited a lot of movement that day, with the result being an earthquake measured at 6.6 at its epicenter. The front, back and inside cover art of The Doobie Brothers' third album, "The Captain and Me" (Warner Bros. Records Inc., 1973), features the band members and manager Bruce Cohn dressed in period 19th-century costume on the Interstate 5 / State Route 14 freeway bridges that collapsed in the Newhall Pass during the Sylmar (aka San Fernando) earthquake of Feb. 9, 1971. The red star is the epicenter of the earthquake event. C. R. Allen and his co‐workers assigned the main shock parameters: 34°24.7′N, 118°24.0′W, focal depth h = 8.4 km, and local magnitude ML = 6.4. On February 9, 1971 at about 6 o’clock the cities of San Fernando and Sylmar experienced an earthquake that ruptured along the Sierra Madre Fault Zone (Oakeshott, Gordon B). On February 9th, 1971, magnitude 6.6 earthquake shook the San Fernando Valley in southern California for 12 seconds. The epicenter was in the city of San Fernando. Approximate traces ofsome ofthe faulting activated during this The San Fernando earthquake (9 February, 1971, M L =6.4, M W =6.6) was initiated at depth (∼13 km below the surface), north of San Fernando and Sylmar, along a plane dipping 40° to northeast and striking 108°, and with fault area of 130 km 2 The fault broke the ground surface north of the San Fernando airport, and caused permanent elevation changes (up to 1.8 m=6 ft) shown in Fig. Sections of … The 1971 San Fernando earthquake struck at 6:00:55 a.m. PST on the morning of February 9, 1971. In 1971, San Fernando earthquake, which was also known as the Sylmar earthquake shook much of southern California in the early morning of February 9, 1971… Severe damage of the dam during the 1971 San Fernando earthquake forced residents to evacuate homes in a 6-mile-long area down the valley. The earthquake occurred along a "blind" thrust fault, close to the San Andreas fault. Evidence is presented which suggest that the 1971 San Fernando earthquake may have been a double event that occurred on two separate, subparallel thrust faults. The Northridge earthquake was the worst earthquake in the Los Angeles basin since the San Fernando earthquake in 1971, which had a 6.7 magnitude. The epicenter was located approximately 10 km northeast of LSFD at a focal depth of approximately 9 km. The San Fernando Valley lies above the north-dipping 1971 Sylmar and south-dipping 1994 Northridge earthquake faults. Rupture is postulated to have occurred from a depth of about 15 km to a depth of about 3 km. The earthquake that rocked the northern San Fernando Valley, near Sylmar measured magnitude 6.6 on the Richter magnitude scale. During the period from 1932 to 1961, the seismicity in this area was relatively low and random. The unanticipated thrust earthquake had a moment magnitude of 6.5 or 6.7 (as determined by several independent institutions) and had a maximum Mercalli intensity of XI (Extreme). It is postulated that the initial event took place at depth on the Sierra Madre fault zone which runs along the base of the San Gabriel Mountains. San Fernando, California, earthquake of 9 February 1971 Item Preview remove-circle ... San Fernando, California, earthquake of 9 February 1971 by Oakeshott, Gordon B., 1904-Publication date 1975 Topics Earthquakes Publisher Sacramento : California Division of Mines and Geology Collection It lasted about 60 seconds, and, in that brief span of time, took 65 lives, injured more than 2,000, and caused property damage estimated at $505 million. Much of the spectacular and devastating damage was in the Sylmar area and "The Sylmar Earthquake" was a name the media latched onto. The quake killed 65 people – most at the Olive View Medical Center and VA Hospital which were both destroyed. There are various names for this earthquake. It was the worst recorded quake in the city's history. Teleseismic P, SV, and SH waves recorded by the WWSS and Canadian networks from the 1971 San Fernando, California earthquake (M L = 6.6) are modeled in the time domain to determine detailed features of the source as a prelude to studying the near and local field strong-motion observations. 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