Earthquake

7. Surface wave having a horizontal motion
8. Number characterizing the relative size of an earthquake(2) bending of a tsunami wave front owing to variations in the water depth along a coastline.
11. Relatively smaller earthquakes preceding the largest earthquake in a series
12. Polished striated rock surfaces caused by one rock mass moving across another on a fault
14. Innermost part of the Earth
16. Seismic surface wave causing the ground to shake in an elliptical motion
18. Sea wave resulting from large-scale seafloor displacements associated with large earthquakes

1. Seismic wave moving through the interior of the Earth
2. Distance between successive points of equal amplitude and phase on a wave
3. Seismic body waves shaking the ground back and forth perpendicular to the direction the wave is moving
4. REBOUND When rockS snap back into an unstrained position
5. Fracture along which the blocks of crust on either side have moved relative to one another
6. Bending of a seismic wave caused by its passage from one material to another having different elastic properties
9. Earthquakes that follow the largest shock of an earthquake sequence.
10. Difference between the initial position of a reference point and any later position
13. Point on Earth's surface vertically above the focus
15. Seismic body waves shaking the ground back and forth in the same direction
17. Outer solid part of the Earth, including crust and uppermost mantle