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 bans construction on active faults in California. Several key attributes of the event were shared with the San Francisco Bay Area, Santa Cruz Mountains, Oakland, California, Jackie Robinson, Santa Cruz, California

Much like the Northridge Earthquake 23 years later, the quake also tore apart freeway overpasses. The At the time, the 1971 San Fernando earthquake was the most destructive event to affect greater Los Angeles since the magnitude-6.3 Long Beach earthquake of 1933. Both the Upper and Lower Van Norman dams were severely damaged as a result of the earthquake. Power lines fell, telephone service cut. It is evident, however, that more faults in the San Fernando Valley area may be active today than are now recognized." There are various names for this earthquake. The spans slipped off of their supports at either end due to lack of proper ties and insufficient space (a 14 in (360 mm) seat was provided) on the support columns. Gordon Oakeshott, Deputy Chief had mapped part of the San Fernando 15-minute quadrangle in doing research for his doctoral dissertation in 1936; he revised and extended the map for publication in 1958 as California Division of Mines Bulletin 172, Geology and mineral deposits of the San Fernando quadrangle, Los Angeles County, California. A preliminary report of their investigations is presented in this magazine. 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.

Although the Richter magnitude of the tremblor was 6.6, ranking it as moderate to large, but not great, it shook a wide, heavily populated area, leaving death and destruction in its wake. On the morning of February 9, eyewitnesses noticed abundant natural gas escaping the ocean surface near Malibu Point, which is situated about 50 km (31 mi) to the southwest from the earthquake's epicenter. Although instruments had recorded a force of .33 The damage at the lower dam consisted of a landslide that dislocated a section of the embankment. Twenty-six buildings that were built prior to 1933 had been constructed following the local building codes and did not require seismic-resistant designs.

GET BREAKING NEWS IN YOUR BROWSER. The 1971 earthquake caused 58 fatalities and about 2,000 injuries. By 1971, the facility comprised 45 individual buildings, all lying within 5 km (3.1 mi) of the fault rupture in Sylmar, but the structural damage was found to have occurred as a result of the shaking and not from ground displacement or faulting. United States Army, United States Coast Guard, United States Marine Corps, United States Navy, United States Air Force Das Southern California Earthquake Data Center lokalisierte das Hypozentrum in 8,4 km Tiefe, das Epizentrum lag auf der von Sylmar aus gesehen anderen Seite der San Gabriel Mountains im Iron Canyon im Gebiet des Sand Canyon, Canyon Country. There was fear of an imminent collapse of the Van Norman Dam, which held more than 3.5 billion gallons of water just northwest of San Fernando.

Charlie Bishop came from San Francisco, as well as several staff members from Sacramento-Quint Aune, Chief Wes Bruer, Bob Matthews, and Bennie Troxel. The 1971 San Fernando (a.k.a.

Rescue efforts at the Veterans Hospital in Sylmar. The fault was studied again in the late 1990s in the Loma Alta Park near Millard Canyon where a fault scarp larger than 2 m (6 ft 7 in) was accessible along a (late The two geologists Carl Wentworth and Robert Yerkes from the US Geological Survey in Pasadena later wrote that "the San Fernando fault was discovered to be active only when it ruptured the ground surface on February 9, 1971. San Gabriel Mountains, San Bernardino Mountains, Santa Ynez Mountains, Cenozoic, San Fernando Valley And thousands of homes, businesses, hospitals and government agencies were turned upside down.It was then the state’s third worst earthquake in terms of lives lost, only exceeded by San Francisco in 1906 and Long Beach in 1933, and the second in terms of property damage, according to seismologists. It was an expensive and heartbreaking lesson, but California has learned something, and can take heart. California State University, Northridge, Los Angeles, San Fernando Valley, Anaheim, California, HIStory By the time the sun had risen, ten geologists from the Los Angeles District Office of the California Division of Mines and Geology were in the field to appraise the geologic effects and to search for further potential hazards created by the earthquake. The hospital buildings, the freeway overpasses, and the Sylmar Juvenile Hall facility were situated on coarse As categorized during the intensive studies immediately following the earthquake, they were labeled the Mission Wells segment, Sylmar segment, Tujunga segment, Foothills area, and the Veterans fault. Free Or Cheap Things Angelenos Can Do From Home The upper lake Freeway interchanges collapsed (killing two men in a pickup truck under one fallen overpass), reservoirs were in danger of imminent failure, forcing people living below them to evacuate, and houses and commerical buildings collapsed or caught fire.


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