The San Francisco 1989 Earthquake The Loma Prieta Earthquake On Tuesday October 17, 1989 at 5:04 PM the Loma Prieta earthquake struck the San Francisco, Monterey Bay, and Silicon Valley areas. Those were no the only areas affected. Many areas up to 70 and 100 miles away could feel the tremble of the quake. The epicenter of the quake was in the Santa Cruz Mountains. The quake measured a magnitude of 7.1. The initial quake lasted 15 seconds. The USGS first thought the magnitude of the quake would be about 6.9 but it increased to 7.1. The quake destroyed many buildings and freeways. A section of the San Francisco-Oakland Bay Bridge collapsed. The power was out in many places and the telephone lines were out also. This was the first time the power had been out since the 1906 earthquake. The earthquake killed 68 people and injured 3,757 people. The cost of the quake was estimated at $6 to $7 billion dollars. The quake happened during the 1989 World Series. The San Francisco Giants were playing the Oakland Athletics. The match up was called the
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