Download a poster of "Liquefaction Damage in the Marina District during the 1989 Loma Prieta Eaerthquake" - (1 MB - PDF Document) Saturday is the 20th anniversary of the Loma Prieta earthquake that killed 63 people, injured almost 3,800 and caused up to $10 billion damage. However, it was also a watershed moment in seismic research. In Part 3 (of, On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. Total damage and loss costs due to the earthquake were estimated to be $6 billion. Damage in San Francisco from the 1989 Loma Prieta earthquake (Oct. 18, 189) Cost of the Loma Prieta earthquake Thanks to the game at Candlestick, commute traffic was exceptionally light. The shock was centered in The Forest of Nisene Marks State Park approximately 10 mi (16 km) northeast of Santa Cruz on a section of the San Andreas Fault System and was named for the nearby Loma Prieta Peak in the Santa Cruz Mountains. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. In this ScienceStruck post, we will provide facts and statistics about this earthquake and the effects of the same. It sent seismic waves from its origin in the Santa Cruz Mountains to San Francisco, the East Bay and beyond. The 1989 Loma Prieta earthquake occurred in northern California on October 17 at 5:04 p.m. local time. This video documents scenes of the October 17, 1989 Loma Prieta Earthquake and its aftermath. It lasts a minute in a magnitude 8. CGS's Related Maps and Publications. In the 83 years prior to the 1906 quake, seven damaging earthquakes of magnitude 6.5 or greater occurred. Archive footage from 1989. Losses to these systems totaled approximated $5.9 billion. A total of 1427 damage sites, collected from more than 30 sources, are concentrated in four zones, three of which are near previously mapped faults. It killed 63 people and injured thousands. These are their stories. Santa Cruz Residents Look Back On Loma Prieta Three Decades Later - Duration: 2:26. Today marks the 30th anniversary of the Loma Prieta Earthquake that shook the San Francisco Bay Area on October 17, 1989. (AP … And studied it. Damage to pavement and near-surface utility pipes caused by the 17 October 1989 Loma Prieta earthquake provides evidence for ground deformation in a 663 km 2 area near the southwest margin of the Santa Clara Valley, California (USA). This powerful quake, the strongest in San Francisco since 1906, struck just before the third game of the series. The Bay Bridge was unusable for a month. (P.d.t.) Death, destruction, and havoc were again visited upon the San Francisco area in 1989. The San Andreas Fault is the boundary between the North American plate and the Pacific plate. 1989 Earthquake Reports and PhotographsFrom the Virtual Museum of the City of San Francisco. It was the strongest earthquake to hit the area since the San Francisco earthquake of 1906. In Part 4 (of, On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. On this day in 1989 the San Francisco Bay Area did a little rocking – and rolling; and a whole lot of quaking. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. Ground Shaking AnimationsTo better understand the distribution of shaking from past and anticipated future earthquakes, seismologists have constructed computer models of earthquakes and the resulting ground shaking. The shaking lasted 20 seconds. Retired seismologist David Oppenheimer reflects on the first prototype earthquake early warning system used during the 1989 Loma Prieta earthquake. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. Land west of the fault has been moving to the northwest relative to land on the east at an average rate of 2 inches per year for millions of year. ​The anniversary of the Loma Prieta earthquake also marks the anniversary of the creation of the Seismic Hazards Zoning Program (SHZP), one of the key programs operated by California Geological Survey (CGS) to aid in preparedness. These are their stories. Geologists had forecast a major earthquake in this area based on historical data, especially the lack of a major seismic event along the San Andreas fault since 1906 -- the 8.3 San Francisco earthquake. The most notable damage included the collapse of the elevated Cypress Structure section of Interstate 880 in Oakland, the collapse of a section of roadbed on the Bay Bridge, and extensive damage to downtown Santa Cruz and San Francisco's Marina District. The aftershock zone stretched 25 miles, from north of Los Gatos near Highway 17 to south of Watsonville near Highway 101. On October 17, 1989, at 5:04:15 p.m. Major property damage i… And studied it. A magnitude 8 earthquake radiates 30 times more energy of a magnitude 7 and 900 times the energy of a magnitude 6. Twenty-five years have now passed since the 1989 Loma Prieta earthquake — a 6.9-magnitude temblor — rocked the San Francisco and Monterey bay areas, causing millions of dollars in damages throughout the region. Please turn on JavaScript and try again. Sixty-three people died and there was more than $7 billion in damage. The 1989 Loma Prieta earthquake occurred in Northern California on October 17 at 5:04 p.m. local time (1989-10-18 00:04 UTC). The earthquake displaced many residents from their homes and severely disrupted transportation systems. The epicenter was located on the San Andreas fault roughly 56 miles south of San Francisco in the Santa Cruz Mountains. The magnitude-6.9 Loma Prieta earthquake struck on Oct. 17, 1989 at 5:04 p.m. On October 17, 1989, at 5:04:15 p.m. (PDT), a magnitude 6.9 earthquake severely shook the San Francisco and Monterey Bay regions. These are their stories. VIDEO: A look back at the hours and days surrounding Loma Prieta Did You Feel It?Map of shaking intensity based on 15,000+ reports from citizens who experienced the earthquake. Click on a pin on the map to see more information. Damage and business interruption estimates reached as high as $10 billion, with direct damage estimated at $6.8 billion. Damage to public infrastructure at or below the ground surface (streets, curbs, and water and gas lines) in southwestern Santa Clara Valley, California, associated with the 1989 Loma Prieta earthquake, is used to support the assertion that the series of photointerpreted lineaments are tectonic in origin and related to long-term reverse faulting along the range front of the Santa Cruz Mountains. Loma Prieta was a 15 second wakeup call to the Bay Area. On Oct. 17, 1989, destruction from the Loma Prieta earthquake killed 67 people and injured 3,757. That particular day … It looks like your browser does not have JavaScript enabled. The devastating shaking wrecked buildings and collapsed freeways from Watsonville north to West Oakland. Over the course of that quarter-century, the physical scars of that devastating event have largely faded from view. Magnitude is a measure of an earthquake's size, but rather than being a dire​ct measure of the level of ground shaking, it is a measurement of the strength of the seismic sound waves given off by the earthquake. Some significant findings were: The Loma Prieta quake was felt as far away as San Diego and western Nevada. This CD-ROM contains 103 digitized color 35-mm images from Open-File Report 90-547 (Nakata and others, 1990). In the week following Loma Prieta, 20 aftershocks magnitude 4.0 or greater and more than 300 of magnitude 2.5 or greater were recorded. And studied it. Reminiscent of the 1906 earthquake, the earth shook, like a table bumped, causing a house of cards to fall. The 6.9 earthquake, centered in the Santa Cruz Mountains, took the … The epicenter was located in the Santa Cruz Mountains west of Loma Prieta Peak on a previously undiscovered fault near the larger and well known San Andreas Fault. The purpose of the SHZP is to minimize loss of life and property through the identification, evaluation and mitigation of seismic hazards. It was an awakening for seismologists to be more aware of these natural disasters due to the fact that it was the largest earthquake in the San Francisco Bay Area since 1906. The Loma Prieta earthquake is the latest in a series of destructive earthquakes that have rocked the San Francisco Bay area during historic times (Table 1). It was a tragic reminder of the destructive power of earthquakes. Thousands of aftershocks were recorded. On October 17, 1989, the Loma Prieta earthquake hits the San Francisco Bay Area. Loma Prieta in the Santa Cruz Mountains. The focal depth was 11 miles (typical California earthquake focal depths are 4 to 6 miles). Also, the World Series between the San Francisco Giants and Oakland A's was postponed. 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