Inc1 Science Rint Task 1 Essay

1253 Words Jun 6th, 2014 6 Pages
Scientific Concepts and the Natural World
RINT Task 1 Western Governors University

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The Earth’s Plate Tectonics
James Hutton was the first scientist to address the Earth was millions of years old, as well as alive and is continuously being formed. Charles Lyell popularized uniformitarianism, and believed the Earth was being shaped by slow moving forces. Alfred Wegener introduced the foundation for the theory of continental drift. Wegener was one of the first to recognize and have an understanding of how the Earth works which required data and information from earth sciences. In the 1960s, the theory for the continental drift became known as the theory of plate tectonics or plate building.
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The quake ran from Monterey Bay to San Francisco covering the whole coast of northern California (Page, R., Stauffer, P. & Hendley, II, J., 1999, p. 1). The Loma Prieta Earthquake was the largest quake to hit the San Francisco Bay area since the massive quake of 1906. The quake left about 63 people dead and an estimated loss of property worth about $10 billion (Page, R., Stauffer, P. & Hendley, II, J., 1999, p. 1). The earthquake caused damage to cities that were as far as 60 miles from its epicenter. Scientists argue that the 15 second quake was caused by a slip on the fault along San Andreas.

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Map of Major Faults in the San Francisco Bay Area

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Scientific Understanding of the Loma Prieta Earthquake of 1989
• The earthquake was caused by a slip along the San Andreas Fault or a subsidiary of it. This was the most horrific earthquake this area has witnessed in over 80 years (Loma Prieta 1989, n.d.). Due to the motion of the average strike-slip and reverse-slip displacements this motion is not normal of the San Andreas fault and this indicates the Loma Prieta Earthquake occurred on a sub-parallel fault (Fleury, 2008). The focal depth of the Loma Prieta Earthquake was 11 miles in depth, which is extremely deep and

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