1994 northridge earthquake

4:30am – January 17, 1994, Northridge, California – I was awoken suddenly by what seemed like someone picking up my bed and dropping it. Abstract. The 1994 Northridge earthquake struck at 4:31 a.m. on January 17 and measured 6.7 on the moment magnitude scale. Seismology: The Northridge Earthquake and its Aftershocks Egill Hauksson, & Lucile M. Jones Published 1995, SCEC Contribution #138 A strong earthquake shook the Los Angeles region on January 17, 1994, at 4:30 am Pacific Standard Time (12:30 UT). The rubble was recycled. On January 17, 1994 at 4:31 a.m., a magnitude 6.6 earthquake struck the Los Angeles metropolitan area. January 20, 1994 — Interstate 5 Freeway overpass as seen from The Old Road in the Newhall Pass. Northridge California Earthquake January 17, 1994 USGS Response to an Urban Earthquake: Northridge '94 Contributors. Twenty-five years ago this week, a violent, pre-dawn earthquake shook Los Angeles from its sleep, and sunrise revealed widespread devastation, with dozens killed and $25 billion in damage. The Northridge Earthquake: January 17, 1994. TYPE OF FAULTING: blind thrust TIME: January 17, 1994 / 4:30:55 am PST LOCATION: 34° 12.80' N, 118° 32.22' W 20 miles west-northwest of Los Angeles 1 mile south-southwest of Northridge What's Changed Since the 1994 Northridge Earthquake On Jan. 17, 1994, a magnitude-6.7 earthquake revealed some of the safety issues that Southern California needed to address The Newhall Pass Interchange, the junction where the Interstate 5 (Golden State Freeway) and Interstate 14 (Antelope Valley Freeway) meet, collapsed during the earthquake’s 20 second tremor and its following aftershocks. I shut my eyes and tried to shake the sleep from my brain with thoughts that I must be having a nightmare. 1994 Northridge earthquakeSection of collapsed low-rise apartment buildings.mw-parser-output .locmap .od{position:absolute}.mw-parser-output .locmap . The performance record of modern landfills during seismic events is very limited. If no others agree with the "new" figure it should be reversed. That allowed for the collection of perishable data on occurrences surrounding the immediate aftermath of the event. The following is the final report on the 1994 Northridge earthquake that struck southern California on January 17, 1994. Earthquake . Imveracious 19:49, 2 April 2014 (UTC) The Publication Citation: 1994 Northridge Earthquake from the NIST is a old publication and since that time facts have changed to what is known now. Northridge 20 Symposium Summary Report | 3 Executive Summary On the 20th anniversary of the Northridge earthquake, more than 600 people gathered in Los Angeles to share the impacts of the 1994 earthquake, highlight accomplishments of the past two decades, and identify necessary steps forward The Northridge earthquake is part of the temporal increase in earthquake activity in the Los Angeles area since 1970. This report describes injuries occurring in the Northridge earthquake which resulted in death or hospital admission. The 1994 Northridge earthquake, however, resulted in further fine-tuning of these definitions Abstract A magnitude 6.8 (Ms) earthquake centered under the community of Northridge in the San Fernando Valley shook the entire Loss Angeles metropolitan area at 4:31 a.m. local time on Monday, January 17, 1994. FILE - This Feb. 16, 1994 file photo shows the Northridge Meadows apartment complex in which 16 people died when the upper floors collapsed onto the so-called soft story ground floor. 34.207, -118.535 (click to see on map) Media. The earthquake measured 6.7 on the Richter scale and caused extensive damage to buildings, utilities and roadways. Category. ADMIN; ATLAS; California Integrated Seismic Network: Southern California Seismic Network (Caltech, USGS Pasadena, and Partners) USGS National Earthquake Information Center, PDE; Additional Information A detailed 3-D P-wave velocity structure of the crust in the epicentral area of the 17 January, 1994 Northridge earthquake is determined by using 104,709 arrival times from 1673 Northridge aftershocks and 2948 other local earthquakes. The following is a guest post by my friend Miki who had first-hand experience with the devastating 1994 Northridge earthquake. The Northridge Earthquake struck on January 17, 1994 at 4:30:55 a.m. 1994 Northridge earthquake. 1994 Northridge Earthquake As the City of Los Angeles slumbered in the early morning hours of January 17, 1994, the earth began to shake from the onset of another California trembler. Damage to the Golden State Freeway Source: Robert A. Eplett. al. 1994 Northridge earthquake, most of the fatalities occurred in buildings suffering from this particular type of irregular configuration. The Northridge earthquake struck Los Angeles on 17 January 1994, origthadng from a previously unknown thrust fault. The maximum horizontal acceleration at rock (MHA) that the MSW landfills were subjected to during this earthquake did not exceed 0.36 g and, in many cases, was significantly lower. How big was the earthquake? The earthquake occurred beneath Northridge, a suburb in the San Fernando Valley, 30 km northwest of Los Angeles (see map on next page). The January 17, 1994 Northridge earthquake damaged four major freeways in the Los Angeles metropolitan area, creating the pospect of gridlock in the nation's prototypical automobile city. Northridge Interchange Collapse Source: Doug Pizac / AP. 6.7. 1994 Northridge Earthquake Hasn't Stopped, Hills Have Risen Dec 17, 1996 Earthquake researchers measuring the movement of the Earth's surface with the Global Positioning System (GPS) have concluded that the Northridge earthquake has continued in a "quiet" way and the Granada Hills have risen about 16 centimeters (about 6 inches) since that first jolt in January 1994. Based on survey responses from 559 firms in the Los Angeles area, this paper summarizes the extent and magnitude of the business losses that can be attributed to transportation disruptions. Epicentered in the San Fernando Valley town of Northridge, California, the earthquake caused serious damage to buildings and sections of elevated freeways; ignited at least one hundred fires as it ruptured gas pipelines; and disrupted water supply systems. The 1994 Northridge earthquake caused $400 million in damage to the campus, the heaviest damage ever sustained by an American college campus. And the Southern California Earthquake Data Center et. The 1994 Northridge earthquake occurred on January 17, at 4:30:55 a.m. PST and was centered in Reseda, a neighborhood in the north-central San Fernando Valley region of Los Angeles, California. Earthquake Information Chronological Earthquake Index Northridge Earthquake. Lat / Lng. The mainshock was followed by an energetic aftershock sequence. California engineers had classified and codified building irregularities as early as 1980s. 1994 Northridge earthquake is similar to these earthquakes: 1952 Kern County earthquake, 1971 San Fernando earthquake, 1857 Fort Tejon earthquake and more. Destroyed in the Northridge earthquake of Jan. 17, 1994. The destructive 1994 quake in Northridge, California, was caused by a previously undiscovered blind thrust fault. On Sunday, January 16, 1994 it was what some call “earthquake weather.” When hot, dry Santa Ana winds scorch the Los Angeles area with temperatures reaching into the 80s by day and plummeting into Date. Immediately following the occurrence of the quake, this researcher was sent to the stricken area. January 17, 1994. When the shaking quickly turned to violent convulsions accompanied by a deafening roar, the City’s residents were at once confronted with the worst disaster in modern Los Angeles history. The 1994 Northridge earthquake was a ṃ of 6.7 (ṃ), blind thrust earthquake that occurred on January 17, 1994, at 4:30:55 a.m. PST in the San Fernando Valley region of the County of Los Angeles.Its epicenter was in Reseda, a neighborhood in the north-central Valley.The quake had a duration of approximately 10–20 seconds, and its peak ground acceleration of 1.8g (16.7 m/s 2) was … The 6.7 magnitude Northridge earthquake shook the entire San Fernando Valley at 4:31 am on January 17, 1994, with an epicenter in Reseda, near Northridge, CA. Mike Hider (Saugus High 1983, son of Jerry Hider) said he "spent several days, 24 hours a day, hauling the concrete from those bridges right down the road to the intersection of Highway 126 and I-5. Cal State Northridge Parking Garage Collapse Events / 1994 Northridge Earthquake. I survived the 1994 Northridge Earthquake... has 2,947 members. The earthquake was magnitude 6.7 on a previously unidentified thrust fault, creating strong horizontal and vertical ground motion lasting up to 10 seconds. Feel free to post your memories of your personal experiences of the 1994 Northridge Earthquake. Although considered “moderate”, with a moment magnitude of 6.7, it was the most costly quake in United States history – and the most damaging to strike the U.S. since the San Francisco quake of 1906. Eight aftershocks of M ≥ 5.0 and 48 aftershocks of 4 ≤ M ≤ 5 occurred between January 17 and September 30, 1994 Magnitude. It had a duration of approximately 10–20 seconds. 1994 NORTHRIDGE EARTHQUAKE: DAMAGE TO A FOUR-STORY STEEL BRACED FRAME BUILDING AND ITS SUBSEQUENT UPGRADE Dominic J KELLY1, David R BONNEVILLE2 And Stacy J BARTOLETTI3 SUMMARY In 1988, the Hewlett-Packard Company (HP) initiated a seismic program consisting of a preliminary seismic evaluation plan and a post-earthquake response plan. Moderate damage to the built environment was widespread; severe damage included collapsed buildings and highway overpasses. Since the Northridge Earthquake hit southern California in 1994, technology has improved, but "a big one" still may occur, scientists say. In the United States, Subtitle D landfills have been strongly shaken primarily only by the 1994 Northridge earthquake. Resulted in death or hospital admission environment was widespread ; severe damage included collapsed buildings and highway overpasses motion up. 1994 USGS Response to an Urban earthquake: Northridge '94 Contributors / AP since 1970 that i must having..., was caused by a previously undiscovered blind thrust fault, creating strong horizontal vertical. Data on occurrences surrounding the immediate aftermath of the 1994 Northridge earthquake on. Northridge, California, was caused by a previously undiscovered blind thrust fault, creating strong horizontal vertical... 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