ShakemapMap showing ground motion and shaking intensity based on instrumental measurements of shaking along with information about local geology and the earthquake’s location and magnitude. The Loma Prieta earthquake of 1989 left over 63 people dead, injured thousands of others, and caused widespread harm to property and the environment alike. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. This publication contains over 100 high-resolution photographs of that event. The epicenter was on the San Andreas fault roughly 56 miles south of San Francisco and 10 miles northeast of Santa Cruz, near Mt. Thousands of aftershocks were recorded. The 7.1 magnitude Loma Prieta earthquake occurred on October 17, 1989. a magnitude 7.1 earthquake severely shook the greater San Francisco and Monterey Bay areas. Here are a … 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. KPIX CBS SF Bay Area 1,362 views 5:04 p.m., Tuesday, October 17, 1989. The Pacific plate moved 6.2 feet to the northwest and 4.3 feet upward over the North American plate during Loma Prieta. 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). Some significant findings were: Total damage and loss costs due to the earthquake were estimated to be $6 billion. 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. The magnitude-6.9 Loma Prieta earthquake struck on Oct. 17, 1989 at 5:04 p.m. Since 1989, the work of the U.S. Geological Survey and other organizations has improved understanding of the seismic threat in the Bay region, promoted awareness of earthquake hazards, and contributed to more effective strategies to reduce earthquake losses. It was a tragic reminder of the destructive power of earthquakes. In this ScienceStruck post, we will provide facts and statistics about this earthquake and the effects of the same. Earthquake Loma Prieta California 1989 The Loma Prieta earthquake was a major earthquake that struck the San Francisco Bay Area of California on October 17, 1989, at 5:04 p.m. local time. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. 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. And studied it. Reminiscent of the 1906 earthquake, the earth shook, like a table bumped, causing a house of cards to fall. These effects: include the pattern and characteristics of strong ground shaking, liquefaction of both floodplain deposits along the Pajaro and Salinas Rivers in the Monterey Bay region and sandy artificial fills along the margins of San... Below are multimedia items associated with this project. ​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. There is still a 50 percent chance for one or more magnitude 7.0 earthquakes In the San Francisco Bay Area in the next 30 years, and the probability of a repeat of the 1906 quake is significant. Remembering The Deadly 1989 Loma Prieta Earthquake For others, memories of the 2014 Napa Quake also flooded into their rattled minds. 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. This powerful quake, the strongest in San Francisco since 1906, struck just before the third game of the series. This paper presents a survey of building pounding caused by the 1989 Loma Prieta earthquake. in Geotechnical Earthquake Engineering and Soil Dynamics 1991 - Second International Conference on Recent Advances in Geotechnical Earthquake Engineering & Soil Dynamics 13 Mar 1991, 12:00 pm - 12:30 pm Lifeline and Geotechnical Aspects of the 1989 Loma Prieta Earthquake T. D. O'Rourke Cornell University, Ithaca, NY H. E. Stewart Santa Cruz Residents Look Back On Loma Prieta Three Decades Later - Duration: 2:26. Strong ground shaking for a magnitude 7 quake typically lasts about 15 seconds. The 1989 Loma Prieta earthquake occurred in northern California on October 17 at 5:04 p.m. local time. These are their stories. "15 Seconds; 25 Years Later: The Loma Prieta Earthquake" premiered Saturday, October 11, 2014 at 9:30 p.m.on ABC7. Magnitude established at 6.9 after consultation with monitoring stations around the world. This movie shows shaking intensity as the seismic waves travel away from the earthquake epicenter over time. 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. It was a wakeup call to prepare for the potentially even more devastating shocks that are inevitable in the future. The shaking lasted 20 seconds. It was a tragic reminder of the destructive power of earthquakes. 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. And studied it. The epicenter was located on the San Andreas fault roughly 56 miles south of San Francisco in the Santa Cruz Mountains. These are their stories. It was a tragic reminder of the destructive power of earthquakes. Did You Feel It?Map of shaking intensity based on 15,000+ reports from citizens who experienced the earthquake. In 1989, the Loma Prieta Earthquake forever changed the face of the Bay Area. * Approximately 16,... Professional Paper 1550 seeks to understand the M6.9 Loma Prieta earthquake itself. 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. Damage and business interruption estimates reached as high as $10 billion, with direct damage estimated at $6.8 billion. A magnitude 8 earthquake radiates 30 times more energy of a magnitude 7 and 900 times the energy of a magnitude 6. The San Andreas Fault is the boundary between the North American plate and the Pacific plate. (P.d.t.) The 1989 Loma Prieta earthquake opened large fissures on Summit Road in Santa Cruz County, Calif. (Jim Gensheimer/Mercury News) William Kelly was renting a … The earthquake drill, which reminded people to drop, cover and hold, took place at 10:17 a.m., coinciding with the Loma Prieta anniversary. One year following Loma Prieta, in direct response to the ground failure caused by the earthquake, the State enacted legislation directing CGS to identify and map areas prone to liquefaction, earthquake-induced landslides and amplified ground shaking. The 6.9 earthquake, centered in the Santa Cruz Mountains, took the … VIDEO: A look back at the hours and days surrounding Loma Prieta Across the bay area, the quake was responsible for 62 deaths, and damage estimates neared the 5 … The magnitude 6.9 quake went down in the history of California’s central coast as the most damaging seismic event since 1906. The epicenter was located near Loma Prieta peak in the Santa Cruz Mountains, approximately 14 km (9 mi) northeast of Santa Cruz and 96 km (60 mi) south-southeast of San Francisco. 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. These are their stories. 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 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). On Oct. 17, 1989, destruction from the Loma Prieta earthquake killed 67 people and injured 3,757. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. As devastating as Loma Prieta was, a magnitude 7.5 earthquake on the Hayward Fault in the East Bay could do $65 billion in damage. Also, the World Series between the San Francisco Giants and Oakland A's was postponed. I cannot believe it has been 20 years since the Loma Prieta earthquake. The epicenter was located near Loma Prieta peak in the Santa Cruz Mountains, approximately 14 km (9 mi) northeast of Santa … Retired seismologist David Oppenheimer reflects on the first prototype earthquake early warning system used during the 1989 Loma Prieta earthquake. On October 17, 1989, the Loma Prieta earthquake hits the San Francisco Bay Area. 2,575 businesses were damaged and 147 were destroyed. on October 17th. 1989 Loma Prieta Earthquake. This CD-ROM contains 103 digitized color 35-mm images from Open-File Report 90-547 (Nakata and others, 1990). 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. Below are publications associated with this project. Click on a pin on the map to see more information. This video documents scenes of the October 17, 1989 Loma Prieta Earthquake and its aftermath. The 1989 Loma Prieta earthquake ended decades of tranquility in the San Francisco Bay region. "The Loma Prieta earthquake was a … Oakland City Hall was evacuated after the earthquake until a US$80 million (equivalent to US$165 million today) seismic retrofit and hazard abatement work was completed in 1995. It was a tragic reminder of the destructive power of earthquakes. The focal depth was 11 miles (typical California earthquake focal depths are 4 to 6 miles). The purpose of this report is to provide a compilation of structural retrofits and replacements of older buildings and infrastructure in the San Francisco Bay Area that have either been completed since 1989 or that are in progress as of October 2018. On October 17, 1989, at 5:04:15 p.m. In Part 3 (of, On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. It examines how the fault that generated the earthquake ruptured, searches for and evaluates precursors that may have indicated an earthquake was coming, reviews forecasts of the earthquake, and describes the geology of the earthquake area and the crustal forces... Professional Paper 1553 describes how people and organizations responded to the earthquake and how the earthquake impacted people and society. Damage in the Marina District was concentrated along the edges of the old lagoon. The aftershock zone stretched 25 miles, from north of Los Gatos near Highway 17 to south of Watsonville near Highway 101. (AP … Today marks the 30th anniversary of the Loma Prieta Earthquake that shook the San Francisco Bay Area on October 17, 1989. It also aired at the following dates and times: Sunday, October 19, … However, it was also a watershed moment in seismic research. The earthquake caused severe damage in some very specific locations in the Bay Area, most notably on unstable soil in San Francisco and Oakland. The earthquake displaced many residents from their homes and severely disrupted transportation systems. It looks like your browser does not have JavaScript enabled. Death, destruction, and havoc were again visited upon the San Francisco area in 1989. On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. The purpose of the SHZP is to minimize loss of life and property through the identification, evaluation and mitigation of seismic hazards. Many other communities sustained severe damage throughout the region located in Alameda, San Mateo, Santa Clara, San Benito, Santa Cruz and Montereycounties. During the 1989 Loma Prieta Earthquake, the soils underlying the Marina District amplified the ground motion as in 1906 and caused the liquefaction of the superficial sandy materials that were used to fill the old lagoon in 1915. On this day in 1989 the San Francisco Bay Area did a little rocking – and rolling; and a whole lot of quaking. The Loma Prieta Earthquake was a powerful earthquake that struck at 5:04PM on Tuesday, October 17, 1989 in the San Francisco Bay area in Northern California (USA). Major property damage i… Brocher, T.M., Gefeke, K., Boatwright, J., and Knudsen, K.L., 2018, Reported investments in earthquake mitigation top \$73 to \$80 billion in the San Francisco Bay Area, California, since the 1989 Loma Prieta earthquake: U.S. Geological Survey Open-File Report 2018–1168, 18 p., https://doi.org/10.3133/ofr20181168. Download a poster of "Liquefaction Damage in the Marina District during the 1989 Loma Prieta Eaerthquake" - (1 MB - PDF Document) Pounding was present over a wide geographical area including the cities of San Francisco, Oakland, Santa Cruz and Watsonville. Scientists deployed an analog system to notify first responders of impending earthquake activity as they worked on rescue efforts at the Cypress Viaduct collapse in Oakland, CA. 18,306 houses were damaged and 963 were destroyed. 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. This motion typically occurs in sudden jumps during large earthquakes. And studied it. Please turn on JavaScript and try again. Cypress Freeway damage is seen after the Loma Prieta earthquake of 1989. 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. Losses to these systems totaled approximated $5.9 billion. EventpageTectonic summary, maps and data. 30 years later, we revisit the earthquake through the eyes of the scientists who experienced it. The 6.0 quake caused nearly $1 billion on damage … Loma Prieta, the 1989 San Francisco Earthquake. In Part 1 (of, On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. In Part 4 (of, On October 17, 1989, at 5:04 pm a magnitude M6.9 earthquake struck near Loma Prieta, California. Loma Prieta in the Santa Cruz Mountains. CGS's Related Maps and Publications. No data point selected. It sent seismic waves from its origin in the Santa Cruz Mountains to San Francisco, the East Bay and beyond. 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. Archive footage from 1989. 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, "Liquefaction Damage in the Marina District during the 1989 Loma Prieta Eaerthquake", Regulatory Earthquake Hazard Zones - San Francisco Bay Area, Regulatory Earthquake Hazard Zones - Southern Califonia Region. The earthquake measured 7.1 on the Richter scale, classifying it as "major".The earthquake ran along the San Andreas Fault, the epicenter was located near the Loma Prieta peak in the Santa Cruz Mountains. The epicenter was located approximately 14.5 km (9 mi) northeast of Santa Cruz and 96.6 km (60 mi) south-southeast of San Francisco, near Loma Prieta Peak in the Santa Cruz Mountains. Over the course of that quarter-century, the physical scars of that devastating event have largely faded from view. It lasts a minute in a magnitude 8. This CD-ROM provides images for use by the interested public, multimedia... Professional Paper 1552 focuses on the response of buildings, lifelines, highway systems, and earth structures to the earthquake. Only two have occurred since the San Francisco earthquake. The investigations evaluate the tools available to the research community to measure the nature, extent, and causes of damage and losses. The 1989 Loma Prieta earthquake occurred on October 18, 1989 at 00:04 UTC in the Santa Cruz Mountains of Central California. 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. The survey database contains more than 200 pounding occurrences involving more than 500 building structures. As devastating as Loma Prieta was, a magnitude 7.5 earthquake on the Hayward Fault in the East Bay could do $65 billion in damage. Lloyd Cluff/Corbis via Getty Images Show More Show Less 7 of 78 Workers check the damage to … In Part 2 (of. They describe human behavior during and immediately after the... Professional Paper 1551 describes the effects at the land surface caused by the Loma Prieta earthquake. That particular day … Sixty-three people died and there was more than $7 billion in damage. It killed 63 people and injured thousands. 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. These are their stories. A magnitude 5.2 aftershock occurred approximately 2.5 minutes after the main shock. Several 5.0-plus seismic events in the two years preceding Loma Prieta also served as warnings. Loma Prieta was a 15 second wakeup call to the Bay Area. 63 people were killed, 3,757 were reported injured and 12,053 displaced. The devastating shaking wrecked buildings and collapsed freeways from Watsonville north to West Oakland. The October 17, 1989, Loma Prieta, California, earthquake: selected photographs; 1999; DS; 29; Nakata, John K.; Meyer, C. E.; Wilshire, H. G.; Tinsley, J. C., III; Updegrove, W. S.; Peterson, D. M.; Ellen, S. D.; Haugerud, R. A.; McLaughlin, R. J.; Fisher, G. R.; Diggles, M. F. Progress toward a safer future since the 1989 Loma Prieta earthquake; 1999; FS; 151-99; Page, Robert A.; Stauffer, Peter H.; Hendley, James W., II. Our photographic coverage reflects the time and resources available immediately after the event and is not intended to portray the full extent of earthquake damage. 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. These efforts will help reduce the impact of future large quakes in the San Francisco Bay region. The Loma Prieta earthquake of 1989 occurred at 5:04 p.m., right before the World Series baseball game between the San Francisco Giants and the Oakland A’s. It was the strongest earthquake to hit the area since the San Francisco earthquake of 1906. This effort represents just one of the many ways CGS strives to fulfill its mission to provide scientific products and services about the state's geology, seismology and mineral resources—including their related hazards—that affect the health, safety, and business interests of Californians. However, it was also a watershed moment in seismic research. 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). In the 83 years prior to the 1906 quake, seven damaging earthquakes of magnitude 6.5 or greater occurred. The Loma Prieta, California, Earthquake of October 17, 1989: Performance of the Built Environment; 1998; PP; 1552; Coordinated by Holzer, Thomas L. The Loma Prieta, California, Earthquake of October 17, 1989: Earthquake Occurrence; 1993; PP; 1550; Coordinated by Bakun, William H.; Prescott, William H. The Loma Prieta, California, Earthquake of October 17, 1989: Societal Response; 1993; PP; 1553; Coordinated by Mileti, Dennis S. The Loma Prieta, California, Earthquake of October 17, 1989: Strong Ground Motion and Ground Failure; 1992; PP; 1551; Coordinated by Holzer, Thomas L. Geographic Names Information System (GNIS), Mapping, Remote Sensing, and Geospatial Data. However, it was also a watershed moment in seismic research. USGS Professional Papers on Loma Prieta Summaries: Four Loma Prieta Earthquake Professional Papers, each containing multiple chapters, document the magnitude 6.9 earthquake that shook the San Francisco and Monterey Bay regions. The Loma Prieta quake was felt as far away as San Diego and western Nevada. Date: October 18, 1989 at 00:04 UTC (October 17, 1989 at 05:04 PM local time) Location: 37.040 -121.877 Depth: 16.79 km Magnitude: 6.9 Mw, 7.1 Ms, 6.7 Ml San Francisco earthquake of 1989, also called Loma Prieta earthquake, major earthquake that struck the San Francisco Bay Area, California, U.S., on October 17, 1989, and caused 63 deaths, nearly 3,800 injuries, and an estimated $6 billion in property damage. 1989 Earthquake Reports and PhotographsFrom the Virtual Museum of the City of San Francisco. I don’t feel like it just happened yesterday or anything – I just can’t believe I’m actually that old! USGS Professional Papers on Loma Prieta Summaries: Prototype Earthquake Early Warning System (Interview), Professional Paper 1550: Earthquake Occurrence, Professional Paper 1551: Strong Ground Motion and Ground Failure, Professional Paper 1552: Performance of the Built Environment, Professional Paper 1553: Societal Response. Loma Prleta ruptured the southernmost 30 miles of the break that caused the 1906 San Francisco Earthquake. ​Revisiting the 1989 Loma Prieta earthquake serves as an important reminder to all residents of California that the geologic processes responsible for creating the beautiful natural landscape we enjoy can sometimes occur suddenly and violently so it’s important to be prepared. Faultline: Remembering Loma PrietaA personal account of the events unfolding, by Mary K. Miller of the Exploratorium. The Bay Bridge was unusable for a month. The earthquake struck at 5:04p.m. And studied it. However, it was also a watershed moment in seismic research. 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