Questions Related To Earthquake

Questions on earthquake
1.The amount of ground displacement in a earthquake is called the _________ .slip
2. The point where movement occurred which triggered the earthquake is the _______ .focus
3. the sequences correctly lists the different arrivals from first to last?
P waves ... S waves .... Surface waves
4. How many seismograph stations are needed to locate the epicenter of an earthquake?
3
5.Earthquakes can occur with _________ faulting.
normal
reverse
thrust
6. Approximately what percentage of earthquakes occur at plate boundaries?
95%
7. How often do magnitude 8 earthquakes occur?
about every 5 to 10 years
8. If only density increases with increasing depth within the Earth, the velocity of a P wave should decrease
9. Body waves consist of the:
P and S waves
10. Earthquake A has a Richter magnitude of 7 as compared with earthquake B's 6. The amount of ground motion is one measure of earthquake intensity.
A is 10X more intense than B
11. In general, the most destructive earthquake waves are the
Surface waves
12. Where is the focus with respect to the epicenter:
directly below the epicenter
13. Who developed the procedure used to measure the size of an earthquake?
Charles Richter
14.Which of the following waves is the slowest?
tsunami
15. the following statements best describes the state of earthquake prediction?
scientists can characterize the seismic risk of an area, but can not yet accurately predict most earthquakes