Across
- 3. Study of seismic waves generated by earthquakes
- 4. Zones commonly found in Japan and Aleutians
- 5. Introduced a physics based measure of earthquake size
- 6. Boundaries where fault lines slide past each other
- 9. Ridge where crustal plates are spread apart
- 13. Proposed an 'elastic rebound' theory for the origin of earthquakes
- 16. The measurement of the intensity of an earthquake
- 17. Builds the first time recording seismograph
- 19. Plates are spreading apart
- 22. A single landmass
- 23. Discovered the earth's solid inner core in 1936
- 24. Irish engineer that studied earthquake damage in Naples
Down
- 1. Identifies velocity boundary between earth's crust and mantle
- 2. Published the first travel-time tables for earthquakes
- 7. Instruments used to measure the intensity of an earthquake
- 8. A scientific theory that describes the large scale motion of the Earth's lithosphere
- 10. Due to the gravitational force the Moon and Sun exert on the crust of the Earth
- 11. Plate motion driven by local convection currents that exert a downward pull on plates in subduction zones at ocean trenches.
- 12. Plate motion driven by friction between the convection currents in the asthenosphere and the more rigid overlying lithosphere.
- 14. The result of a sudden release of energy in the Earth's crust that creates seismic waves.
- 15. Identified P-, S- and surface waves in earthquake records
- 18. Developed first seismometer
- 20. Developed first electromagnetic seismograph
- 21. The line of intersection between the fault plane and the Earth's surface