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Matches in DBpedia 2014 for { ?s ?p 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 at the northern edge of the San Fernando Valley in southern California. The unanticipated thrust earthquake measured 6.6 on the Richter magnitude scale and had a maximum perceived intensity of XI (Extreme) on the Modified Mercalli intensity scale. Damage was locally severe in the northern San Fernando Valley, and other effects were strongest to the south of the epicenter where the earthquake produced extensive surface faulting in the mountains as well as urban settings along city streets and neighborhoods, where uplift and other effects affected private homes and businesses. The San Fernando earthquake was one in a series of thrust earthquakes that affected the Los Angeles area and a study of the Sierra Madre Fault indicated more substantial thrust earthquakes had previously occurred in the San Gabriel Mountains region.The event impacted a number of health care facilities in Sylmar, San Fernando, and other densely populated areas north of Los Angeles. The Olive View Medical Center and Veterans Hospital both experienced very heavy damage and buildings collapsed at both sites, causing the majority of deaths that occurred. The buildings at both facilities were put together with mixed construction styles, but engineers were unable to thoroughly study the buildings' responses because they were not outfitted with instruments for recording strong ground motion, and this prompted the Veterans Administration to install seismometers at all of its high-risk sites. Other sites throughout the Los Angeles area had been instrumented as a result of local ordinances and an extraordinary amount of strong motion data was recorded, more so than any other event up until that time, and the success in this area spurred the initiation of California's Strong Motion Instrumentation Program.Transportation around the Los Angeles area was severely afflicted with roadway failures and the collapse of several major freeway interchanges. The near total failure of the Van Norman Dam resulted in the evacuation of tens of thousands of downstream residents, though an earlier decision to maintain the water at a lower level may have contributed to saving the dam from being overtopped. Schools were strongly affected, as they had been during a previous earthquake in Long Beach, but this time amended construction styles greatly improved the outcome for the thousands of school buildings in the Los Angeles area. Other aspects of the event included a methane seep that emanated from the floor of the Pacific Ocean near Malibu for several days following the earthquake, and hundreds of various types of landslides that were photographically documented and visually surveyed in the San Gabriel mountains. As had happened following other earthquakes in California, legislation related to building codes were once again revised, with laws that specifically addressed the construction of homes or businesses near known active fault zones.. }

• 1971_San_Fernando_earthquake abstract "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 at the northern edge of the San Fernando Valley in southern California. The unanticipated thrust earthquake measured 6.6 on the Richter magnitude scale and had a maximum perceived intensity of XI (Extreme) on the Modified Mercalli intensity scale. Damage was locally severe in the northern San Fernando Valley, and other effects were strongest to the south of the epicenter where the earthquake produced extensive surface faulting in the mountains as well as urban settings along city streets and neighborhoods, where uplift and other effects affected private homes and businesses. The San Fernando earthquake was one in a series of thrust earthquakes that affected the Los Angeles area and a study of the Sierra Madre Fault indicated more substantial thrust earthquakes had previously occurred in the San Gabriel Mountains region.The event impacted a number of health care facilities in Sylmar, San Fernando, and other densely populated areas north of Los Angeles. The Olive View Medical Center and Veterans Hospital both experienced very heavy damage and buildings collapsed at both sites, causing the majority of deaths that occurred. The buildings at both facilities were put together with mixed construction styles, but engineers were unable to thoroughly study the buildings' responses because they were not outfitted with instruments for recording strong ground motion, and this prompted the Veterans Administration to install seismometers at all of its high-risk sites. Other sites throughout the Los Angeles area had been instrumented as a result of local ordinances and an extraordinary amount of strong motion data was recorded, more so than any other event up until that time, and the success in this area spurred the initiation of California's Strong Motion Instrumentation Program.Transportation around the Los Angeles area was severely afflicted with roadway failures and the collapse of several major freeway interchanges. The near total failure of the Van Norman Dam resulted in the evacuation of tens of thousands of downstream residents, though an earlier decision to maintain the water at a lower level may have contributed to saving the dam from being overtopped. Schools were strongly affected, as they had been during a previous earthquake in Long Beach, but this time amended construction styles greatly improved the outcome for the thousands of school buildings in the Los Angeles area. Other aspects of the event included a methane seep that emanated from the floor of the Pacific Ocean near Malibu for several days following the earthquake, and hundreds of various types of landslides that were photographically documented and visually surveyed in the San Gabriel mountains. As had happened following other earthquakes in California, legislation related to building codes were once again revised, with laws that specifically addressed the construction of homes or businesses near known active fault zones.".