Earthquakes and Seismology
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20 terms
Terms | Definitions |
|---|---|
 Most major earthquakes occur | in association with zones of subduction |
| The greatest number of earthquakes occur | from the surface to a depth of 40 miles |
| The seismogram data that are used to determine the distance from a seismic station to the epicenter of an earthquake are the | differences in the arrival time of the p and s body waves |
| The focus of an earthquake is | the point where the seismic energy was released |
| The similarity in the geographic distribution of earthquakes and volcanic activity is | they are both associated with the plate margins |
| The force that drive the San Andreas Fault are the result of | plate tectonics |
| Rocks from the surface to a depth of a few hundred miles | The rocks decrease in brittleness and increase in plasticity downward |
| Most of the damage resulting from an earthquake is due to the | Love Waves |
| The number of earthquakes annually that occur with a Richter Scale reading 8 or hight | Fewer than 5 |
| The major difference between shear and compression shock waves is that | the direction in which the waves move the material through which they are passing |
| The seismic wave that is a combination of shear and compression motion is | Rayleigh Wave |
| The Benioff Zone is a zone of earthquakes associated with | Zone of subduction |
| The point on Earth's surface where the energy of seismic waves is at a maximum | Epicenter |
| The Mercalli-Rossi Scale measures | Damage |
| Every step up the Richter Scale Represents _______ times the amount of earth movement | 10 |
| The seawave generated by earthqukes within or marginal to an ocean basin is called | tsunami |
| The component of a seismograph that remains stationary during the arrival of seismic waves is the | pendulum |
| The first seismic wave to arrive at a seismic station is the | p body wave |
| The location of an earthquakes epicenter requires data from a minimum of | 3 stations |
| Segments of a fault that have not experienced recent earthquakes is called a | seismic wave |
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