Across
- 2. an instrument that measures earthquakes
- 3. a wave that shakes the ground back and forth perpendicular to the direction the wave is moving
- 5. scientists who study the genesis and the propagation of seismic waves in geological materials
- 6. a seismic wave that shakes the ground back and forth in one direction and then the other direction
- 7. a seismic waves where the waves move away from the boundary and then back
Down
- 1. a sudden shaking of the ground as a result of movements within the earth's crust
- 2. a wave in the earth produced by an earthquake
- 4. a wave vibrating in the direction of propagation