The 1971 San Fernando earthquake, also known as Sylmar earthquake, struck the San Fernando Valley near Sylmar at 6:00:55 a.m. PST on Feb. 9, 1971, with a magnitude of 6.6. Burbank, California - Wikipedia In the 1971 San Fernando earthquake, which took place along the western edge of the Sierra Madre Fault, surface ruptures were nearly 12 mi long, including one portion a few miles northwest of Glendale. The epicenter in the north San Fernando Valley is in the same area as the 1971 San Fernando earthquake. The epicenter was in the city of San Fernando. San Fernando Earthquake In the early morning hours of February 9, 1971 a 6.6 earthquake shook Southern California. Perched above the densely populated San Fernando Valley, the Lower San Fernando Dam--predecessor to the Los Angeles Dam--holds a large reservoir, 1.6 miles long and as much as 130 feet deep. [2]There are various names for this earthquake. In other words, it is buried. 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. Sylmar) earthquake (Mw = 6.6) occurred in the early morning hours of February 9. . The largest events in the San Fernando earthquake series, initiated by the main shock at 14h 00m 41.8s UT on February 9, 1971, were chosen for analysis from the first three months of activity, 87 events in all. 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 earthquake that rocked the northern San Fernando Valley, near Sylmar measured magnitude 6.6 on the Richter magnitude scale. These changes are referred chiefly to bench mark Tidal 8, San Pedro, as invariant in elevation; they have been almost uniformly positive and generally episodic. Note that a blind fault is a fault which does not extend to the surface. Heaviest death toll was in San Fernando Valley, epicenter of the jolting, rumbling temblor. In comparison, both the Loma Prieta (1989) and Northridge (1994) quakes measured “IX Violent” on the Mercalli Scale, two steps below this quake (the Sylmar Earthquake, 1971). Much of the spectacular and devastating damage was in the Sylmar area and "The Sylmar Earthquake" was a name the media latched onto. 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). The 7:42 a.m. shock was the strongest in the Los Angeles area since the 1971 San Fernando earthquake and was felt as far as San Diego and San Luis Obispo, California and Las Vegas, Nevada. Whittier, California Puente Hills Fault San Gabriel Valley Whittier Narrows 1971 San Fernando earthquake The San Fernando Fault, located 6 mi northwest of Burbank's downtown, caused the 6.6 magnitude 1971 San Fernando earthquake. FIGURE 1 The San Fernando Earthquake ofFebruary 9, 1971. The 1971 San Fernando (a.k.a. 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. 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 English: The 1971 San Fernando earthquake in the San Fernando Valley, Los Angeles County, California. The San Fernando Valley lies above the north-dipping 1971 Sylmar and south-dipping 1994 Northridge earthquake faults. [1] The earthquake lasted approximately 60 seconds. On this day 40 years ago, a 6.6 magnitude earthquake broke at 6:01 a.m. Sylmar got its name on the event, but the epicenter was deep under the San Gabriel Mountains, in the San Fernando … 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. 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… The quake killed 65 people – most at the Olive View Medical Center and VA Hospital which were both destroyed. • The epicenter of the magnitude 6.6 disastrous earthquake was in the foothills of the San Gabriel Mountains, at the northeastern edge of the Valley. played a major role in the rescue and communications efforts. Rupture is postulated to have occurred from a depth of about 15 km to a depth of about 3 km. There are various names for this earthquake. On February 9th, 1971, magnitude 6.6 earthquake shook the San Fernando Valley in southern California for 12 seconds. The earthquake occurred along a "blind" thrust fault, close to the San Andreas fault. The spatio-temporal variation of seismicity prior to the 1971 San Fernando, California, earthquake is studied for the area within 35 km of the epicenter. The Pico Canyon temblor probably originated slightly west of the epicenter of the 1971 earth- quake, and it certainly indicates that moderate earthquake It was the worst recorded quake in the city's history. During the period from 1932 to 1961, the seismicity in this area was relatively low and random. The 1971 San Fernando earthquake (also known as the Sylmar earthquake) occurred in the early morning of February 9 in the foothills of the San Gabriel Mountains in southern California. Downtown, caused the 6.6 magnitude 1971 San Fernando Valley, epicenter of the jolting, rumbling.. 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