Review _3

Review _3 - Review #3 Earthquakes (Chapter 6) Vocabulary:...

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Review #3 Earthquakes (Chapter 6) Vocabulary: (you should be able to define these terms) Fault Scarp – Step caused by slip on the fault hanging wall – Block of rock above the fault surface footwall – Block of rock below the fault surface Focus – Point within the Earth where an earthquake rupture starts Epicenter – Point vertical to the focus on the surface seismic wave – Elastic wave caused by an earthquake or explosion Body waves – Seismic wave that moves through the interior of the Earth, not waves that travel near the Earth’s surface P-waves (compressional wave) – Seismic wave that shakes the ground back and forth in the same direction and opposite direction as the direction the wave is moving s-waves (shear wave) – Seismic wave that shakes the ground back and forth perpendicular to the direction the wave is moving surface waves – Seismic wave that is trapped near the surface of the Earth long-waves – A surface wave having horizontal motion that is transverse (or perpendicular) to the direction the wave is traveling Questions you should be able to answer Explain the various types of faults (dip slip: normal, reverse, thrust, strike slip: right lateral, left lateral) and tectonic causes o Dip-slip fault – inclined fractures where the blocks shift vertically Normal – Rock mass above inclined fault moves down Reverse – Rock above the fault moves up Thrust – Reverse fault with a dip of 45 degrees or less Strike slip – Fast movement that occurs between sides of a fault when the two sides of the fault become unstuck creating an earthquake How do P- and S-waves move? Which travel faster? o P-waves travel faster than S-waves Explain the three sets of waves visible on a seismograph Which mediums can S- and P-waves travel through? What determines how much damage a structure sustains? How are faults recognized in the field

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This note was uploaded on 04/22/2008 for the course ACCT 2251 taught by Professor Lilysieux during the Winter '07 term at CSU East Bay.

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Review _3 - Review #3 Earthquakes (Chapter 6) Vocabulary:...

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