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Geology - earthquakes - Statistics
General Stats
- This quiz has been taken 19 times
- The average score is 12 of 14
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| Why are earthquakes unpredictable? | Fault lines are complex. Tectonic plates are always moving so it is hard to tell when an earthquake will occurr | 100%
|
| How do you read a seismogram? | Ground motion vs time. Each tick mark = 1 minute. P-S time interval indicates distance to epicenter. First surface wave is the love wave | 100%
|
| Best definition of a P-wave | primary, compressional wave. can move through solid and liquid. propogated through push and pull. fastest wave. | 100%
|
| How do you locate the epicenter of an earthquake? | Trinagulation - needs 3 seismic stations, the intersection of those three is the epicenter | 100%
|
| Definition of a Fault | a break or fracture in the rock along which movement has occurred. One up, one down. | 95%
|
| Elastic Rebound Theory | Explains fault rupture and earthquake generation. explanation for how energy is spread during earthquakes. ex: breaking a twig | 95%
|
| Best definition of an S-wave | secondary, shear wave. slower than P-wave. can only move through solids. more deadly bc of slowness. | 95%
|
| Definition of a distant tsunami | waves that travel out to sea for long periods of time without losing energy. Velocity and speed of waves depend on the depth to seafloor and gravity. | 84%
|
| Definition of a local tsunami | waves travels toward land quick, little time for people to react, destructive. | 84%
|
| Earthquake Intensity | subjective - based on measure of damage, Modifield Mercalli Scale - subjective measure, damage of ground motion, not quantitative, uses roman numerals to measure - 1 small, 12 bad | 79%
|
| Earthquake Magnitude | An earthquake's magnitude is determined by measuring the amplitude of the largest seismic wave recorded on a seismograph | 74%
|
| Where does the most damage occur as result from an earthquake? | Closest to the epicenter | 74%
|
| Rayleigh Wave - seismic waves | similar to ocean waves, rolls, moves the ground up and down, slowest and very deadly wa e | 63%
|
| Definition of a Joint | a break or fracture in the rock with no movement | 53%
|
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