Loma Earthquake Essay

926 WordsMay 3, 20154 Pages
Geology The Loma Earthquake 1989 Name Course Date due An earthquake is a physical occurrence where vibrations are caused by underlying rocks that are breaking under a lot of stress. The rocks are situated under the earth’s crust and are mostly caused when two tectonic plates come together, and pressure is created along the fault lines. It is then released towards the earth’s surface resulting in an earthquake. In 1989, the Loma Earthquake occurred in the region of the Santa Cruz Mountains that caused a total number of 63 fatalities, 3,557 injured related cases. It also destroyed a lot of property which is estimated to be about $6 billion. This is the biggest earthquake ever to occur and recorded along the fault lines of San Andreas from the previous massive earthquake back in April of 1906. Most of the property devastation that was caused by the earthquake happened in the Oakland and also in San Francisco areas that were about 100 kilometers northwards from the fault line where the section moved in the San Andreas region. A lot of houses collapsed while several reinforced –concrete viaducts were destroyed in four areas of Oakland and also San Francisco. The areas namely: Embarcadero Freeway, Nimitz Freeway, which is in Highway 10, Oakland and the Interstate 280. Several communities that were also affected and experienced heavy damage include Los Gatos, Watsonville, and Santa Cruz. The process of liquefaction that was evidently identified by the occurrence of slumping, lateral settling and sand boils that were located in areas more than 110 kilometers starting from the origin of the earthquake. The liquefaction resulted in massive destruction of buildings and other facilities in the San Francisco Marina district. It spread to the coastal region of Alameda and

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