Earthquakes

5. stress that causes lengthening
6. offset on the ground surface where one side of a fault has moved vertically with respect to the other
7. point underground where the fault ruptures
9. point on the surface directly above the focus
11. slow, gradual displacement along a fault without any noticeable earthquakes
12. tallest mountain in Washington state
14. stress that causes shortening
15. segment of an active fault known to produce significant earthquakes that has not slipped in an unusually long time
16. boundary where two tectonic plates pull apart
19. boundary where two tectonic plates collide
21. plate subducting under the North American Plate in the Cascadia Subduction Zone
23. volcano in the PNW that erupted in 1980

1. boundary where two tectonic plates slide past each other
2. most seismically active earthquake belt
3. fault where the headwall moves up
4. fault where the headwall moves down
8. stress where different forces are applied to the top and bottom of the rock
10. type of waves produced by an earthquake
13. type of potential energy stored in rocks
17. sudden vibration or shaking of the earth caused by rapid release of energy stored in rocks
18. most dangerous earthquake that can occur in the Cascadia Subduction Zone
20. fault where rocks slide past each other
22. tectonic plate boundary