EESA06H3 Chapter Notes - Chapter 3: Seismic Wave, Transverse Wave, Love Wave
28 Feb 2013
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* seismic waves waves of energy produced by an earthquake: energy released when a rock breaks. The break between two rock masses is known as a fault: cause the ground to tremble and shake during an earthquake. * the brittle/breaking behavior is characteristic of rocks near the earth"s surface while rocks at depth deform plastically (ductile: occurs due to increased temperature and pressure at depths. * focus (hypocenter) point within the earth where seismic waves first originate: center of the earthquake, the point of initial breakage and movement on a fault, epicenter point on the earth"s surface directly above the focus. * two types of seismic waves are generated during earthquakes: body waves seismic waves that travel through the earth"s interior, spreading outward from the focus in all directions. Cause more property damage than body waves because surface waves produce more ground movement and travel more slowly, so they take longer to pass.
