Earthquakes 2 2
Terms
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- The order in which seismic waves are recorded
- P waves, S waves, then Surface waves
- List four instruments that geologists use to monitor movements along faults
- Creep Meter, Tiltmeter, Laser-ranging device, GPS satellites
- Measures movement along a strike-slip fault
- Creep Meter
- A device that bounces laser beams off a reflector to detect fault movements
- laser-ranging divice
- Works like a carpenter's level
- tiltmeter
- A device that measures tiny movements of markers set up on the opposite sides of a fault via satellites
- GPS satellite
- Force that opposes the motion of one surface as it moves across another surface
- friction
- What two factors help to determine earthquake risks
- Where faults are active and where past earthquakes have occurred
- What determines where and how much the ground shakes
- Type of rock and soil
- A process where violent shaking turns loose soil into liquid mud
- liquefication
- An earthquake that occurs after a larger earthquake
- aftershock
- Large ocean waves usually caused by strong earthquakes below the ocean floor
- tsunamis