The earthquake's epicenter was in Northridge, CA, and it was a magnitude 6.7 shock that proved to be the most costly earthquake in United States history. Il 1994 Northridge terremoto è stato un momento di magnitudo 6,7 ( M w ), cieco terremoto di spinta che si è verificato l'annuale Martin Luther King, Jr. Giorno di festa, il Lunedi, 17 gennaio 1994. California engineers had classified and codified building irregularities as early as 1980s. Earthquake Hazards Zone Application (EQ Zapp), Highway Corridor Landslide Hazard Assessment, School, Hospital, and Environmental Reviews, EQ Zapp (A-P Fault Zones and Seismic Hazard Zones), Information Warehouse (reports, maps, and data), Center for Engineering Strong Motion Data, Visit the California Integrated Seismic Network. Twenty years ago, on Jan. 17, 1994, at 4:31 a.m., the Northridge earthquake struck Southern California — the 6.7-magnitude quake killed 60 people and … The facts of the Northridge earthquake… The earthquake occurred on January 17, 1994 at 4:31am. Local city and county permitting agencies are required to request “special geological and engineering studies” be performed within these zones prior to land development and construction. Fatality estimates range from just under 60 to more than 70 people killed, with most studies placing the number at around 60. Let us know if you have suggestions to improve this article (requires login). Science 1994 ; 266 : 389 – 397 . Roads and bridges damaged by the Northridge earthquake in California, 1994. Shake Map Northridge 1994.jpg 612 × 718; 114 KB. Select from premium 1994 Northridge Earthquake of the highest quality. At the moment of the 1994 Northridge Earthquake, centered in the San Fernando Valley of the City of Los Angeles, I staffed the geodetic desk of the City's Survey Division. A resident and a cameraman look at damage to the Kaiser Permanente Building following the Northridge earthquake on Jan. 17, 1994. The 1994 Northridge earthquake, however, resulted in … Northridge is located about 30 km northwest of Los Angeles. The 6.7 magnitude earthquake damaged several buildings as well as destroying all communications, such as telephone lines and causing computer systems to shut down. 1994 Northridge earthquake.svg 618 × 343; 1.32 MB. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Shake Map Northridge 1994.jpg 612 × 718; 114 KB. Earthquakes similar to or like 1994 Northridge earthquake. Get a Britannica Premium subscription and gain access to exclusive content. Northridge earthquake of 1994, earthquake that struck the densely populated San Fernando Valley in southern California, U.S., on Jan. 17, 1994. On January 17, 1994, at 4:31 a.m. PST, a magnitude 6​.7 earthquake centered in Northridge struck the southern California area. From January 24 through March 15, 1994, 170 persons with laboratory evidence of acute coccidioidomycosis * were identified in Ventura County, California. The Northridge earthquake is part of the temporal increase in earthquake activity in the Los Angeles area since 1970. A significant portion of the transportation system around Los Angeles was shut down, as sections of major freeways (including the Santa Monica Freeway and the Golden State Freeway) collapsed and numerous bridges sustained heavy damage. 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 Six major freeway ramps were demolished, 200 buildings suffered major damage, and hundreds of thousands were displaced… The Northridge earthquake also resulted in societal impacts that have fundamentally changed the approach for disaster mitigation. Reducing the impact of these ground-failure hazards, not only save lives and property during future earthquakes, but leads to more sustainable economic communities. Widespread liquefaction (saturated soil that behaves as a liquid when shaken) was triggered as far away as the Port of Los Angeles, some 30 miles from the epicenter. January 20, 1994 — Interstate 5 Freeway overpass as seen from The Old Road in the Newhall Pass. The 1994 Northridge Earthquake Disaster Response: The Local Emergency Medical Services Agency Experience - Volume 11 Issue 3. The earthquake's epicenter was in Northridge, CA, and it was a magnitude 6.7 shock that proved to be the most costly earthquake in United States history. ADMIN; ATLAS; California Integrated Seismic Network: Southern California Seismic Network (Caltech, USGS Pasadena, and Partners) USGS National Earthquake Information Center, PDE; Additional Information The major shock lasted 10–20 seconds and registered a magnitude of 6.7. Articles from Britannica Encyclopedias for elementary and high school students. Northridge California Earthquake January 17, 1994 USGS Response to an Urban Earthquake: Northridge '94 Contributors. (Hal Garb/AFP/Getty Images) A 6.7 magnitude earthquake … 1994-01-19 15:14:42 UTC 2.4 magnitude, 1 km depth Northridge, California, United States 2.4 magnitude earthquake 1994-01-19 15:14:42 UTC at 15:14 January 19, 1994 UTC INTRODUCTION: This paper describes the 1994 Northridge earthquake experience of the local emergency medical services (EMS) agency. 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. Find link is a tool written by Edward Betts.. searching for 1994 Northridge earthquake 29 found (271 total) Jim Berkland (2,275 words) case mismatch in snippet view article find links to article predict earthquakes, including the 1989 Loma Prieta earthquake and 1994 Northridge Earthquake and who popularized the idea that some people are earthquake sensitive The percentage of buildings completely destroyed was relatively low in light of the strength of the ground motions. 1994 Northridge earthquake, most of the fatalities occurred in buildings suffering from this particular type of irregular configuration. Northridge California Earthquake January 17, 1994 USGS Response to an Urban Earthquake: Northridge '94 Contributors. "On Shaky Ground": Living Through the 1994 Northridge Earthquake. Most of the casualties occurred in wood-frame apartment buildings, popular in the San Fernando Valley, and particularly in those with weak first floors or lower-level parking garages. While every effort has been made to follow citation style rules, there may be some discrepancies. Emerging Infectious Diseases Coccidioidomycosis Following the Northridge Earthquake -- California, 1994 . The third major earthquake to occur in the state in 23 years (after the 1971 San Fernando Valley and 1989 San Francisco–Oakland earthquakes), the Northridge earthquake was the state’s most destructive one since the San Francisco earthquake of 1906 and the … The duration was about 10 seconds to 20 seconds. The Northridge earthquake occurred at 4:30 a.m. local time on January 17, 1994. Destroyed in the Northridge earthquake of Jan. 17, 1994. It looks like your browser does not have JavaScript enabled. Earthquakes similar to or like. The Northridge earthquake that struck at 4.31 a.m. on Monday, January 17, 1994 affected an area of 2,192 square miles in the San Fernando Valley, a densely populated residential area of northern Los Angeles, California.1 Three counties, Los Angeles, Ventura and Orange were affected by the earthquake. 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. The Los Angeles News Group asked readers across the region to share their memories of Jan. 17, 1994 when a 6.7 magnitude earthquake struck Northridge at 4:30 a.m. The earthquake occurred just after 4:30 am local time along a previously undiscovered blind thrust fault in the San Fernando Valley. At 4:30 a.m. on January 17, 1994, the shaking of an earthquake awakened 10 million people in the Los Angeles region of Southern California. Earthquakes similar to or like 1994 Northridge earthquake. The 1994 Northridge earthquake killed more than 50 people and created widespread devastation in Los Angeles. Description. Known as the Northridge Earthquake, it caused at least 57 fatalities (a subsequent study put the death toll at 72, including heart attacks) and injured thousands. The 1994 "Northridge" earthquake hit the Los Angeles area about 4:30 AM on Martin Luther King Day. Documentary about the 1994 Earthquake that devastated the CSU Norhtridge campus.Help us caption & translate this video!http://amara.org/v/BvX4/ On January 17, 1994, at 4:31 a.m. PST, a magnitude 6 .7 earthquake centered in Northridge struck the southern California area. The Seismic Hazards Program at CGS continues to produce similar maps throu​ghout California. The earthquake lasted for 10-20 seconds but that didn’t limit the damage in any substantial way because the earthquake had a magnitude of 6.7. Before Northridge, there was another Los Angeles earthquake that also “changed engineering,” the 1971 San Fernando earthquake, located roughly in the same area as Northridge. Omissions? Please turn on JavaScript and try again. Since it occurred on Martin Luther King Day and at 4:31 AM, the death tool was limited to 61 and injury count to 7,300. Fires that broke out in the San Fernando Valley and in Venice and Malibu caused additional harm. A magnitude 6.8 (Ms) earthquake centered under the community of Northridge in the San Fernando Valley shook the entire Los Angeles metropolitan area at 4:31 a.m. local time on Monday, January 17, 1994. These communities are now benefiting from safer development. At 4:30 a.m. on January 17, 1994, the shaking of an earthquake awakened 10 million people in the Los Angeles region of Southern California. Its epicentre was in Northridge, a suburb located about 20 miles (32 km) west-northwest of downtown Los Angeles. "On Shaky Ground": Living Through the 1994 Northridge Earthquake. Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites. As I recall, I was then engaged in updating the basis of the City's entire Precise Benchmark Index from the National Geodetic Vertical Datum of 1929 (NGVD29) to the North American Vertical Datum of 1988 (NAVD88). The hypocentral depth was 19 km. The third major earthquake to occur in the state in 23 years (after the 1971 San Fernando Valley and 1989 San Francisco–Oakland earthquakes), the Northridge earthquake was the state’s most destructive one since the San Francisco earthquake of 1906 and the costliest one in U.S. history. ADMIN; ATLAS; California Integrated Seismic Network: Southern California Seismic Network (Caltech, USGS Pasadena, and Partners) USGS National Earthquake Information Center, PDE; Additional Information Shake your way into this quiz. Earthquakes similar to or like. 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. File:1994 Northridge earthquake.svg. The earthquake caused up to $20 billion in damage costs, plus $40+ billion in economic loss, making it the co​stliest earthquake disaster in U.S. history. Ring in the new year with a Britannica Membership, This article was most recently revised and updated by, https://www.britannica.com/event/Northridge-earthquake-of-1994, National Institute of Standards and Technology - Engineering Laboratory - Earthquake Northridge California 1994, Northridge earthquake of 1994 - Student Encyclopedia (Ages 11 and up). Although this earthquake was much more powerful than the 1994 Northridge earthquake, the damage and loss of life were minimized by its location in the sparsely-populated Mojave Desert. Interested in testing your earthquake knowledge? A resident and a cameraman look at damage to the Kaiser Permanente Building following the Northridge earthquake on Jan. 17, 1994. The Antelope Valley Freeway in the aftermath of the 1994 Northridge earthquake. These Seismic Hazard Zones, or Zones of Required Investigation, delineate where there is a high likelihood of these hazards occurring in future earthquake events. 1994 Northridge earthquake. When the Northridge earthquake struck at 4:31 a.m. on January 17, 1994, it left much of the city in ruins with buildings and freeways collapsed. Information from its description page there is shown below. Situation The Northridge earthquake on January 17, 1994 in Southern California measured 6.7 Richter. Earthquake Northridge California 1994. Known as the Northridge Earthquake, it caused at least 57 fatalities (a subsequent study put the death toll at 72, including heart attacks) and injured thousands. 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 timing of the earthquake (early morning during a federal holiday) is thought to have prevented a higher death toll, as most residents were in their beds, rather than on failed freeways or in other collapsed structures (such as office buildings or parking lots). Geological Survey and Southern California Earthquake Center: The magnitude 6.7 Northridge, California, earthquake of 17 January 1994. Property damage was severe and widespread; although the worst damage was sustained by communities in the western and northern San Fernando Valley, other areas of Los Angeles county were affected, as were parts of Ventura, Orange, and San Bernardino counties. The earthquake was a right-lateral strike-slip event, and involved the rupture of several different faults over a length of 75 to 85 km (47 to 53 mi). Wikipedia. 1994 Northridge earthquake.svg 618 × 343; 1.32 MB. The mainshock was followed by an energetic aftershock sequence. Intense ground shaking generated widespread ground failures in the region. Eight aftershocks of M ≥ 5.0 and 48 aftershocks of 4 ≤ M ≤ 5 occurred between January 17 and September 30, 1994. Description. 1 Three counties, Los Angeles, Ventura and Orange were affected by the As a consequence of the severe losses caused by this event, the Federal Emergency Management Agency (now under the U.S. Department of Homeland Security) awarded the California Geological Survey nearly $20 million to accelerate the zoning of earthquake hazards under the Seismic Hazards Mapping Act of 1990. 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. A timeline of the events surrounding the quake are below: A 6.7 magnitude earthquake stru... Look back at KNBCʼs coverage of the the 1994 Northridge earthquake. While Northridge did cause significantly more damage than the 1989 Loma Prieta earthquake, dollar amounts are always approximate and in any case, should probably be adjusted somehow for inflation. Since the Northridge event, over 6,000 square miles of land covering the greater Los Angeles Metropolitan Area, including all of Orange County and half of Ventura County, and portions of the San Francisco Bay Area have been zoned under the Act. Of particular importance was the need to increase the seismic resistance of hospitals. While Northridge did cause significantly more damage than the 1989 Loma Prieta earthquake, dollar amounts are always approximate and in any case, should probably be adjusted somehow for inflation. METHODS: Data reported are descriptive and were collected from multiple independent sources, and can be reviewed publicly and confirmed. Hospitals were overflowing and this caused many problems. Moment 6.7, 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. The Northridge earthquake that struck at 4.31 a.m. on Monday, January 17, 1994 affected an area of 2,192 square miles in the San Fernando Valley, a densely populated residential area of northern Los Angeles, California. Media in category "1994 Northridge earthquake". Cal state northridge quake damage.jpg 1,018 × 704; 183 KB. The 1994 Northridge earthquake killed more than 50 people and created widespread devastation in Los Angeles. Wikipedia. Find the perfect 1994 Northridge Earthquake stock photos and editorial news pictures from Getty Images. The following 24 files are in this category, out of 24 total. The 1994 Northridge earthquake greatly affected the CSUN campus, damaging much of its infrastructure, and causing multiple fires and explosions throughout the campus. The 1994 Northridge, Calif., earthquake caused widespread permanent ground deformation on the gently sloping alluvial fan surface of the San Fernando Valley. In retrospect, it appeared that the profession was caught largely unaware by the 1994 Northridge earthquake and did not expect the kinds of damage that occurred, particularly in the newer buildings, since the code had been modified significantly just 20 years before, along with other improvements in the intervening years. Discussed are means that should improve future local agency disaster responses. Northridge earthquake of 1994, earthquake that struck the densely populated San Fernando Valley in southern California, U.S., on Jan. 17, 1994. A 6.7-magnitude temblor waylaid Los Angeles on January 17, 1994. This area includes more than 150 incorporated cities and developing county lands that have an aggregate population exceeding 12 million people, and an average annual construction volume of over $10 billion. Timeline: The 1994 Northridge Earthquake A look at events of the Jan. 17, 1994, Northridge earthquake By Jason Kandel • Published January 16, 2014 • … The rubble was recycled. For many engineers, this earthquake produced the first visual evidence of what a damaged but life-safe building looked like. Our editors will review what you’ve submitted and determine whether to revise the article. 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. Ground motions from five significant earthquakes have been recorded by now at the site: Kern County 1952, San Fernando 197 1, Whittier Narrows 1987, Sierra Madre 199 1, and Northridge 1994 In the Northridge earthquake, 0.41g peak acceleration was measured in the parking lot and 0.29g in the basement of the building. Please refer to the appropriate style manual or other sources if you have any questions. 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 to make our communities more resilient to future earthquakes. Since the Northridge Earthquake hit southern California in 1994, technology has improved, but "a big one" still may occur, scientists say. Moment 6.7, 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. In 1994, the Los Angeles region was rocked by a massive 6.7 earthquake that crumbled freeways and left the city in panic. Northridge was the epicenter of the 6.7 magnitude earthquake that occurred in the early morning of January 17, 1994 killing dozens of 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. The 1994 Northridge earthquake, registering a 6.7 moment magnitude and centered near Los Angeles, California, offers a source of exogenous variation in large-scale maternal stress that is minimally confounded by physical stress or endogenous ex ante migration. Updates? During the earthquake, CGS ground motion instruments recorded horizontal accelerations of 1.25g and vertical accelerations of 1.2g (1g = force of gravity). Northridge Earthquake Photo Collection Browse Collection About The Northridge Earthquake Photo Collection contains a series of photographs taken by Geography Department staff members in the days and months after the 1994 Northridge earthquake. This earthquake had a 6.9 moment magnitude. 1994 Northridge earthquake. The Antelope Valley Freeway in the aftermath of the 1994 Northridge earthquake. Once special studies are performed by qualified engineers and geologists, measures to physically mitigate these ground-failure hazards are included in the development plans before permits are issued. The ground cracks and distributed deformation damaged both pipelines and surface structures. Recognizing and fixing these potential problems before development occurs is the most cost-effective way to deal with these earthquake hazards. Other resolutions: 320 × 178 pixels | 640 × 355 pixels | 800 × 444 pixels | 1,024 × 568 pixels | 1,280 × 710 pixels. Most significantly, the state created the California Earthquake Authority, a publicly managed but privately funded organization offering basic residential earthquake insurance. CrossRef Google Scholar PubMed It was the costliest natural disaster in United States history at that time and the total destruction was estimated at $20 billion dollars, with an estimated $49 billion of economic loss. Size of this PNG preview of this SVG file: 618 × 343 pixels. This is a file from the Wikimedia Commons. Media in category "1994 Northridge earthquake". Thousands of landslides occurred throughout the mountains surrounding the San Fernando Valley and as far north as Castaic Lake. Accordingly, a number of legislative changes were made in the aftermath of the Northridge earthquake. The extent of the property damage in an area so well-prepared for earthquakes was staggering. Nevertheless, tens of thousands of buildings were damaged, with many “red-tagged” as unsafe to enter and many more restricted to limited entry (“yellow-tagged”). Cal state northridge quake damage.jpg 1,018 × 704; 183 KB. The 6.7 magnitude Northridge earthquake shook the entire San Fernando Valley at 4:31 am on January 17, 1994. These types of ground failures caused severe damage to building foundations and to vital lifeline infrastructure (transportation corridors, water, gas, and electric transmission facilities). Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. The following 24 files are in this category, out of 24 total. Timeline: The 1994 Northridge Earthquake A look at events of the Jan. 17, 1994, Northridge earthquake By Jason Kandel • Published January 16, 2014 • Updated on January 17, 2018 at 7:52 am Corrections? The 1994 Northridge Earthquake Northridge Earthquake: 1994 quake still fresh in Los Angeles minds after 20 years The 4:31 a.m. jolt hit Los Angeles from 11 miles deep, shaking it from its slumber w… In 1994, the Los Angeles region was rocked by a massive 6.7 earthquake that crumbled freeways and left the city in panic. 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