Across
- 4. the reading or pattern obtained on the seismograph
- 6. sudden shaking of the ground caused by vibration deep inside the earth
- 7. instument detecting earthquakes
- 8. an undersea earthquake
Down
- 1. hot molten rock
- 2. the crust is made up of this
- 3. the instrumentused to measure an earthquake
- 5. lava below the earths surface