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[69] When the earthquake hit, the shaking was amplified on the former marshland, and soil liquefaction occurred. [22] One of these drivers did not see the open gap in time; the car plunged over the edge and smashed onto the collapsed roadbed. [19] The Federal Emergency Management Agency (FEMA) turned people who were homeless prior to the earthquake away from homeless shelters and provided shelter for those with homes prior to the earthquake. It occurred 17 km beneath the Santa Cruz Mountains along a left-stepping restraining bend in the San Andreas fault system. The quake caused the Oakland side of the bridge to shift 7 in (18 cm) to the east, and caused the bolts of one section to shear off, sending the 250-short-ton (230 t; 500,000 lb; 226,800 kg) section of roadbed crashing down like a trapdoor. While the teams' stadiums had suffered only minor damage, it took several days for power and transmission links at Candlestick Park to be repaired. We test the hypothesis that the origin of the diverse suite of aftershock mechanisms following the 1989 M 7.1 Loma Prieta, California, earthquake is related to the post-main-shock static stress field. Since the bay was only two blocks from the burning buildings,[52] water from the bay was pumped by the fireboat Phoenix, to engines on the shore, and from there sprayed on the fire. [74] Instead of rebuilding Interstate 880 over the same ground, Caltrans rerouted the freeway farther west around the outskirts of West Oakland to provide better access to the Port of Oakland and the San Francisco–Oakland Bay Bridge, and to meet community desires to keep the freeway from cutting through residential areas (at the time the original viaduct was constructed, West Oakland was predominantly occupied by African and Hispanic-Americans). This motion was not observed along a single fault break at the surface but occurred in … The strong motion records also allowed for the causative fault to be determined – the rupture was related to the San Andreas Fault System. The 1989 event's oblique-slip rupture was at 10 km and below on a fault plane that dipped 70° to the southwest. [57] Police arrested those who refused to stop searching. The first is that the geometry of the San Andreas Fault goes through a transition every several thousand years. Mount St. Helens eruption in 1980 was a volcanic eruption whereas Loma Prieta suffered a 6.9 magnitude earthquake in 1989 so there is obvious difference in the fact there different types of natural disasters. As many as six teams of dogs and their handlers were at work identifying the large number of damaged buildings that held no victims. Total displacement for these shocks was relatively small (approximately 4 in (100 mm) of strike-slip and substantially less reverse-slip) and although they occurred on separate faults and well before the mainshock, a group of seismologists considered these to be foreshocks due to their location in space and time relative to the main event. Loma Prieta Earthquake 1989 . A San Francisco police officer stands near home plate at Candlestick Park just after the Loma Prieta earthquake suspended World Series Game 3, Oct. 17, 1989. At 90km South East San Francisco in the USA. Ten Years After: First in a week-long retrospective of the Loma Prieta quake", "Claim Settled in the Only Quake Death, Injury on Bay Bridge", "25 Years Since Loma Prieta: Santa Cruz Journalist Has Photographic Memories of 1989 Quake", "89 quake: Wake-up call for Bay Area buildings", "Low-Frequency Magnetic Field Measurements Near the Epicenter of the M, "Loma Prieta Earthquake: 15 years later. Archived footage from ABC10 back in 1989 shows how events unfolded from the Loma Prieta earthquake. [42] About an hour later, NBC News also began continuous coverage with Tom Brokaw anchoring and featuring local coverage from its then-San Francisco affiliate, KRON-TV. This honor goes to the 1960 magnitude 9.5 earthquake in Chile. I decided to take a shower. The majority of landslides occurred to the southwest of the epicenter, especially along road cuts in the Santa Cruz Mountains and in the Summit Road area, but also along the bluffs of the Pacific Coast, and as far north as the Marin Peninsula. [2], Fifty-seven of the deaths were directly caused by the earthquake; six further fatalities were ruled to have been caused indirectly. Because it happened during a national live broadcast of the 1989 World Series, taking place between Bay Area teams San Francisco Giants and the Oakland Athletics, it is sometimes referred to as the "World Series earthquake". The collapse of a section of the double-deck Nimitz Freeway in Oakland was the site of the largest number of casualties for the event, but the collapse of man-made structures and other related accidents contributed to casualties occurring in San Francisco, Los Altos, and Santa Cruz. It occurred 17 km beneath the Santa Cruz Mountains along a left-stepping restraining bend in the San Andreas fault system. [56], Immediately, a number of civilians began to free victims from the rubble of Ford's Department Store and the Santa Cruz Coffee Roasting Company – both buildings had collapsed inward on customers and employees alike. Return to the DART Activation's & Deployments page . We determined the source characteristics of the Oct. 18, 1989 Loma Prieta, California, earthquake using teleseismic data. Remembering Loma Prieta by Mary K. Miller . Private donations poured into aid relief efforts and on October 26, President George H. W. Bush signed a $1.1 billion ($2.3 billion today) earthquake relief package for California. KTVU anchors Dennis Richmond and Elaine Corral began their coverage from the station's parking lot, as power had not yet been restored to that section of Oakland. [47] Among the four deaths, one family lost their infant son who choked on dust while trapped for an hour inside their collapsed apartment. [57] A woman was found dead inside Ford's. [17], While the effects of a four-year drought limited the potential of landslides, the steep terrain near the epicenter was prone to movement, and up to 4,000 landslides may have occurred during the event. Who was the lady with the trophy in roll bounce movie? Guardians of the City. The 1989 Loma Prieta earthquake occurred on October 18, 1989 at 00:04 UTC in the Santa Cruz Mountains of Central California. Oakland Airport repair costs were assessed at $30 million (equivalent to $65 million today). 1. [62] The earthquake damaged several historic buildings in the Old Town district of Salinas, and some were later demolished. The October 18, 1989 edition of NBC's Today that covered the earthquake ran until noon Eastern Time. [1][15], The Loma Prieta earthquake was named for Loma Prieta Peak in the Santa Cruz Mountains, which lies just to the east of the mainshock epicenter. [26][27], After the earthquake occurred, a group led by Antony C. Fraser-Smith of Stanford University reported that the event was preceded by disturbances in background magnetic field noise as measured by a sensor placed in Corralitos, about 4.5 miles (7 km) from the epicenter. what are the three types of plate boundaries? [74] In the meantime, traffic was detoured through nearby Interstate 980, causing increased congestion. Santa Cruz capitalized on fate, working together to rebuild downtown after quake", "The California Quake; NBC News Tells of Errors and Obstacles to Early Coverage of Quake", "Bay Area Television News Prepares For End Of An Era", "KTVU comes back on-air after 1989 earthquake". How do you put grass into a personification? Abstract. We determined the source characteristics of the Oct. 18, 1989 Loma Prieta, California, earthquake using teleseismic data. Roughly half of the land the Cypress Viaduct was built on was filled marshland, and half was somewhat more stable alluvium. 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. A miscommunication made by emergency workers at Yerba Buena Island routed some drivers the wrong way; they were directed to the upper deck where they drove eastward toward the collapse site. The San Andreas Fault ruptured for a length of 290 mi (470 km) during the 1906 shock, both to the north of San Francisco and to the south in the Santa Cruz Mountains region. Highway 17 was blocked for several weeks due to a large slide and one person was killed by a rockfall along the coast. They map faults. b) List the type of plate boundary that caused the 1964 Great Alaskan earthquake. Earthquakes at divergent plate boundaries are usually relativel… [36] Liquefaction also caused damage in the Watsonville area. And lastly, the 1989 event did not occur on the San Andreas Fault. 60. Shaken – and then stirred. The type of movement between Tectonic Plates will determine the type of movement the earth will have during an earthquake. [60], During the first few days following the quake, electric power to most Santa Cruz County subscribers was out, and some areas had no water. [32] Many other communities sustained severe damage throughout the region located in Alameda, San Mateo, Santa Clara, San Benito, Santa Cruz and Monterey counties. The 1989 Loma Prieta earthquake occurred on October 18, 1989 at 00:04 UTC in the Santa Cruz Mountains of Central California. The earthquake is featured in films and television shows: Some earthquake and disaster-themed television documentaries that feature the earthquake include: Image of collapsed Cypress freeway structure in Oakland, California, USGS ShakeMaps showing similar intensity patterns for the June 1988 (left) and August 1989 events near, Oakland and Interstate 880/Cypress Viaduct, 1989 World Series and television coverage of earthquake, Todd Kennedy Hitting the American Highway: The Ontology of the Hobo-hero – 2007 "...she also utilizes, 1915 Panama-Pacific International Exposition, Learn how and when to remove this template message, "The origin of the tsunami excited by the 1989 Loma Prieta Earthquake – Faulting or slumping", "Comparing sea level response at Monterey, California from the 1989 Loma Prieta earthquake and the 1964 Great Alaskan earthquake", "The origin of the tsunami excited by the 1989 Loma Prieta Earthquake —Faulting or slumping? [48] After the Exposition, apartment buildings were erected on the landfill. The epicenter was located near Loma Prieta Peak in the Santa Cruz Mountains. Local History. Two moderate shocks, referred to as the Lake Elsman earthquakes by the USGS, occurred in the Santa Cruz Mountains region in June 1988 and again in August 1989. This solution is similar to those obtained from long‐period Rayleigh and Love waves, P nL waves, and first‐motion data. earthquake is different from the major boundary between the Pacific and the North American plates; if this is the case, the Loma Prieta earthquake is a rather rare non-characteristic event. [33][34], In Santa Cruz, close to the epicenter, 40 buildings collapsed, killing six people. [57] Police dogs were brought in to help locate other victims. Hint: Look for human settlement patterns in relation to each. We use a 3-D boundary-element algorithm to calculate static stresses, combined with a Coulomb failure criterion to calculate conjugate failure planes at aftershock locations. Andrew Lawson, a geologist from the University of California, Berkeley, had named the fault after the San Andreas Lake (prior to the occurrence of the 1906 San Francisco earthquake) and later led an investigation into that event. Liquefaction was also a significant issue, especially in the heavily damaged Marina District of San Francisco, but its effects were also seen in the East Bay, and near the shore of Monterey Bay, where a non-destructive tsunami was also observed.[11]. Photo by NASA Marshall Space Flight Center (NASA-MSFC). Damage was heavy in Santa Cruz County and less so to the south in Monterey County, but effects extended well to the north into the San Francisco Bay Area, both on the San Francisco Peninsula and across the bay in Oakland. Its effects included broken windows in Los Gatos, and other light damage in Holy City, where increased flow was observed at a water well. Other damage included cracked walls and foundations and broken underground pipes. 2. [62] Many residents slept outside their homes out of concern for further damage from aftershocks, of which there were 51 with magnitudes greater than 3.0 in the following 24 hours, and 16 more the second day. On the afternoon of October 17, 1989, I tuned my portable radio to the third game of the World Series—an across-the-bay battle between the Oakland Athletics and the San Francisco Giants. Cars on the upper deck were tossed around violently, some of them flipped sideways and some of them were left dangling at the edge of the freeway. 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