9th Pro Revised - Earthquake Studies

May 1st, 2015
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An earthquake (also known as a quake, tremor or temblor) is the result of a sudden release of energy in the Earth's crust that createsseismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time. Earthquakes are measured using observations from seismometers.

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9th Pro RevisedBy sivakumaran | Studymode.comintroductionAnearthquake(also known as aquake,tremorortemblor) is the result of a sudden release of energy in theEarth'scrustthat createsseismic waves. Theseismicity,seismismorseismic activityof an area refers to the frequency, type and size of earthquakes experienced over a period of time. Earthquakes are measured using observations fromseismometers. Earthquake fault typesMain article:Fault (geology)There are three main types of fault, all of which may cause an earthquake: normal, reverse (thrust) and strike-slip. Normal and reverse faulting are examples of dip-slip, where the displacement along the fault is in the direction ofdipand movement on them involves a vertical component.Strike-slip faultsare steep structures where the two sides of the fault slip horizontally past each other; Examples are the earthquakes inChile, 1960;Alaska, 1957;Sumatra, 2004, all in subduction zones. The longest earthquake ruptures on strike-slip faults, like theSan Andreas Fault(1857, 1906), theNorth Anatolian Faultin Turkey (1939) .[15]Earthquakes and volcanic activityEarthquakes often occur

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