2:38. Situated at the boundary to the San Gabriel Valley and San Fernando Valley, the Sierra Madre Fault Zone (also known as the Sierra Madre-Cucamonga Fault) runs along the southern edge of the San … Windows shattered. Science. The 1971 San Fernando (a.k.a. Categories:   Palmer DF, Henyey TL. Playing next. The worst damage was done here being newly opened (one There were the Watts Riots, the assassination of Robert F. Kennedy at The Ambassador Hotel, Charles Manson, the Chicano Moratorium in East Los Angeles, the ongoing destruction of the original Bunker Hill, the Sunset … 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, … The February 9, 1971 earthquake in San Fernando Valley, California, caused slides in the embankments of two old adjacent hydraulic fill dams. 1971 May 14;172(3984):712-5. The earthquake that rocked the northern San Fernando Valley, near Sylmar measured magnitude 6.6 on the Richter magnitude scale. It also occurred on a hitherto unknown fault, albeit a different one from the San Fernando fault (see Figure 2). This is the San Fernando Valley. Also known as the Sylmar Earthquake, the magnitude-6.5 quake was reported on a Tuesday at about 6:01 a.m. Its origin was in the foothills of the San Gabriel Mountains north of Los Angeles, but shaking was felt across a widespread part of the San Fernando Valley. More than 80,000 people living downstream had to leave their homes for four days, while engineers frantically shored up the dam and lowered the water level. See more ideas about sylmar, earthquake, san fernando valley. The death toll of this earthquake was about 58, but the property damage was enormous.  |  San Fernando Juvenile Hall, after earthquake, 1971 Creator Unknown Date Created and/or Issued 1971-02 2001-08-27 Publication Information California State University, Northridge. Known as the San Fernando earthquake or the Sylmar earthquake, it caused 58 deaths and more than $500 million in damage. Photo: E. Leyendecker, USGS. Geologists had known for a long time that the San Gabriel Mountains above the San Fernando Valley were riddled with faults. Today in Earthquake History, February 9, 2017  28:14. It caused hospitals and schools to collapse, brought down sections of elevated freeways and cost 64 people their lives. Dam failure Scary. This paper compares the distribution of damage from the San Fernando, 1971, and Northridge, 1994, earthquakes. 21st century Contemporary era. 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). Jul 9, 2013 - 1971 Sylmar Earthquake San Fernando Valley Lived through this quake on Feb. 9! San Fernando Valley earthquake of Feb. 1971, Sylmar, California Public Domain The epicenter was located approximately 10 km northeast of … Retro and Weird. The epicenter of the quake was located in the San Gabriel Mountains, with numerous nearby Los Angeles communities affected. But it was generally accepted that none of these demarcation lines between two separate geologic units were active, meaning that they had not produced any earthquakes recently. the 1971 san fernando earthquake An hour before sunrise, at 6:01 AM, PST, on February 9, 1971, the San Fernando region was struck by one of the most devastating earthquakes in California history.  |  : San Fernando Juvenile Hall, after earthquake, 1971 : Foothill Freeway after earthquake, 1971 : Olive View Medical Center after the 1971 Sylmar quake, before demolition There are various names for this earthquake. The aftermath led to major changes for building construction and the Alquist-Priolo Act. 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. Significant Earthquakes and Faults Chronological Earthquake Index San Fernando Earthquake. San fernando earthquake of 9 february 1971: pattern of faulting. The February 9, 1971 earthquake in San Fernando Valley, California, caused slides in the embankments of two old adjacent hydraulic fill dams. The documentary moves along quickly and uses actual newsreel footage as well as well-staged re-enactments, blended together in a leanly edited narrative. found: Wikipedia, Feb. 24, 2006 (The Sylmar earthquake struck at 6:00:55 a.m. PST on the morning of February 9, 1971. (The earthquake of 9-Feb-1971). The red line is the fault on which the Northridge quake occurred in 1994. 1771 Words 8 Pages. May 1, 2020 - Explore David's board "sylmar earthquake 1971" on Pinterest. Instead of … USGS 'Sylmar Quake' or 'Sylmar earthquake' is … High Acceleration In the end, the dam held and the evacuees were allowed to return to their homes. Sylmar) earthquake (Mw = 6.6) occurred in the early morning hours of February 9. Final report}, author = {Schiff, A J and Yao, J T.P. Some decades later, the San Fernando earthquake affected the San Fernando Valley north of Los Angeles with heavy damage to several hospitals. The 1971 San Fernando Earthquake, by Bob Burnside "County Recurrent" is pleased to present another story from Chief Bob Burnside, Ret., this time with respect to the Sylmar Earthquake that struck early in the morning on Feb. 9, 1971, and resulted in one of the earliest multi-lifeguard agency swift water response that we know of in …  |  found: Wikipedia, Feb. 24, 2006 (The Sylmar earthquake struck at 6:00:55 a.m. PST on the morning of February 9, 1971. 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… 1971 2/09 14:01 UTC 34.40N 118.39W 5km deep Ms=6.5, San Fernando, California. Yerkes -- Main shock and larger aftershocks of the San Fernando earthquake, February 9 through March 1, 1971 / C.R. Sylmar Earthquake 1971 Hospital Damage. San Fernando has had: (M1.5 or greater) 0 earthquakes in the past 24 hours 1 earthquake in the past 7 days; 21 earthquakes in the past 30 days; 320 earthquakes in the past 365 days 45 years ago - 1971 Sylmar earthquake... Did you experience it? D News. This is the Olive View Medical Center. This is the San Fernando Valley. 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. In some areas of the epicentral region the ground had shaken so violently that seismic sensors recorded accelerations of more than 1.25 g, where g is the standard gravitational acceleration at the Earth's surface. 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. But the threat of disaster didn't end when the shaking stopped. The Slides in the San Fernando Dams During the Earthquake of February 9, 1971. 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. We evacuated because the Van Norman Dam was cracked, and they thought it might burst down on the valley! The unanticipated thrust earthquake had a moment magnitude of 6.5 or 6.7 (as determined by several independent institutions) and … Introduction / Arthur Grantz -- An estimate of the damage / Reuben Kachadoorian -- Geologic setting and activity of faults in the San Fernando area, California / Carl M. Wentworth and R.F. … Jun 21, 2017 - San Fernando Valley earthquake (02-09-1971). More than once have dams failed or were overtopped due to the shaking of large earthquakes - with devastating consequences for the people living downstream. • 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. The 6.6 magnitude earthquake with an epicenter located along a 12 mile fault zone below the San Gabriel Mountains lasted approximately 12 seconds and affected the entire San Fernando Valley. 0:51. ‘The Incredibles' Lead a New Safety Campaign in OC and LA, Free Or Cheap Things Angelenos Can Do From Home, Disney Artifacts Go to Auction in Honor of Walt's Birthday, Wind and Red Flag Weather Drive Fires in Southern California Ahead of Holidays, Copyright © 2020 NBCUniversal Media, LLC. Today in Earthquake History: San Fernando 1971. Download a PDF of "San Fernando Earthquake of February 9, 1971" by the National Research Council for free. Earthquakes are best described as a shaking or vibration of the ground caused by breaking of rock. 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 February 9, 1971, with a magnitude of 6.6. 24, No. This is the Olive View Medical Center. 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. The San Fernando earthquake of February 9, 1971, was a geologic phenomenon not unlike many similar earthquakes that occur every year around the world. Saved from scvhistory.com On Feb. 9, 1971, the deadly San Fernando Earthquake rattled Southern California, leaving more than 60 people dead and causing more than $500 million in property damage. This was struck by the earthquake on February 9th of 1971. The Symlar San Fernando Valley Earthquake of 1971. Mapping of the surface breaks that resulted from the San Fernando earthquake of 9 February 1971 reveals that the pattern of faulting was highly complex; it consisted of a number of segments that produced ground displacements and acceleration throughout the entire northern end of the San Fernando Valley. There are various names for this earthquake. It occurred at 6:00:41. 1971 San Fernando (California) Earthquake Archive. Antelope Valley Freeway Collapse (1971/1994): This occurred at a highway interchange at Newhall Pass, north of Sylmar; Southern California The failure of the Interstate 5/14 interchange in 1971 … During the Northridge earthquake in January 1994, more than 50 people were killed and the quake caused damage worth $35 billion. The 1971 San Fernando earthquake (also known as the Sylmar earthquake) happened in the early morning of February 9 in the San Gabriel Mountains.It was at the northern edge of the San Fernando Valley in southern California.The quake measured 6.6 on the Richter scale.The damage was severe near the San Fernando Valley. 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). Forty-six years ago today, the possibility of such a sudden dam burst was the hair-raising fear, in the chaos and devastation following the magnitude 6.7 earthquake that struck the San Fernando Valley north of Los Angeles. All rights reserved. Residents along the 405 Freeway were evacuated for days until the dam was shored up and determined to be safe. Please leave this template in place to link the article … 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 … Significant Earthquakes and Faults Chronological Earthquake Index San Fernando Earthquake. When seismologists checked their records they were utterly surprised. List of earthquakes in California - Wikipedia The section of freeway in Sylmar, California that was intended to open first (between Interstate 5 and Maclay Avenue) was damaged by the 1971 … Source: USGS, How right they were was demonstrated 23 years later, when almost the same areas of the San Fernando Valley were again struck by a damaging earthquake. "Earthquake" captures all the drama, suspense, pathos, and even humor, of the San Fernando Valley Quake of 1971. Seismologists call it the San Fernando earthquake. Following these to earthquakes, geologists are now sure that many more of these hidden faults crisscross deep beneath the San Fernando Valley. 4-5. Earthquake - Magnitude 2.5 quake shakes in the San Fernando Valley. Report. It was followed up by two large aftershocks. San Fernando Valley. Earthquakes are best described as a shaking or vibration of the ground caused by breaking of rock. Both events had similar size, occurred on blind thrust faults beneath the densely populated San Fernando Valley of the Los Angeles metropolitan area, and hence offer a rare opportunity to compare the effects of the two earthquakes. But even now, after further detailed studies, they are not sure whether they have identified all blind faults in the area or if the valley's inhabitants are in for more surprises. The worst damage was done here being newly opened (one Once the shaking was over and rescuers started to assess the damage, the imminent fear of a new catastrophe arose: The Van Norman Dam just northwest of the town of San Fernando, where 3.6 billion gallons of drinking water were stored, was severely damaged. 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. 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. 1971 Pantera Repair Paint Video Daily Motion Channel Simi Valley, California. from California Geology, April/May 1971, Vol. San Fernando Valley Natural Disasters Southern California Old Houses Childhood Memories Melbourne Around … Earthquake title=1971 San Fernando earthquake date= 9 February 1971 magnitude = 6.6 M w depth=convert|8.4|km|mi|sp=us location=coord|34.416|N|118.37|W|region:US|display=inline countries affected = USA (Southern California) casualties = 65 killedThe 1971 San Fernando earthquake (also known as Sylmar earthquake) struck the San Fernando Valley near Sylmar at 6:00:55 a.m. PST on February 9 1971 … Earthquake - magnitude 2.5 quake shakes in the San Fernando earthquake struck at 6:00:55 a.m. on. 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