EESA06H3 Chapter 3: Chapter 3 - Earthquakes.docx
12 Apr 2012
School
Department
Course
Professor
Document Summary
Earthquake a trembling or shaking of the ground caused by the sudden release of energy stored in the rocks beneath the surface. Seimic waves a wave of energy produced by an earthquake. Elastic rebound theory the sudden release of progressively stored strain in rocks results in movement along a fault. 3. 1 indonesia/sumatra earthquake and tsunami, december 26, 2004 largest earthquake 9. 3. Focus the point within the earth from which seismic waves originate in an earthquake. Epicenter the point on the earth"s surface directly above the focus of an earthquake. P wave a compressional wave (seismic wave) in which rocks vibrate parallel to the direction of the direction of wave propagation. S wave a seismic wave propagated by a shearing motion, which causes rock to vibrate perpendicular to the direction of wave propagation. Surface waves a seismic wave that travels on the earth"s surface.
