Across
- 3. Large crust segments floating on the mantle.
- 5. Secondary, slower quake waves.
- 7. Vibrations from a quake.
- 8. Area where plates come together.
- 9. Zone where plates move apart.
Down
- 1. Primary, fast earthquake waves.
- 2. Earthquake recording instrument.
- 4. Earthquake's ground zero.
- 6. Earthquake's strength measurement.