Across
- 5. an intense shaking of the Earth's surface
- 7. the size of the earthquake source
- 8. the location in the earth where the earthquake starts.
- 9. a seismic body wave that shakes the ground back and forth perpendicular to the direction the wave is moving
- 12. Region along an active fault where stress is accumulating because no earthquakes have occurred there recently
- 14. a device for measuring the movement of the earth
- 15. a seismic wave that moves through the interior of the earth
- 18. a fracture or zone of fractures between two blocks of rock
- 19. the part of the earth's interior between the metallic outer core and the crust
- 20. a smaller earthquake following the main shock of a large earthquake
Down
- 1. the outermost layer of the Earth
- 2. a seismic body wave that shakes the ground back and forth in the same direction and the opposite direction as the direction the wave is moving
- 3. the movement downslope of a mass of rock, debris, earth, or soil
- 4. giant waves caused by earthquakes or volcanic eruptions under the sea
- 6. the outer solid part of the earth, including the crust and uppermost mantle.
- 10. an instrument used to determine the location and magnitude of earthquakes
- 11. point in the crust where a seismic rupture begins.
- 13. the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves
- 16. a seismic seismic wave that is trapped near the surface of the earth
- 17. an earthquake that occurs before a larger seismic