Tectonic Plates

2. the measurement of the strength of an earthquake
4. destructive mudflow
5. when an earthquake erupts frequently
6. a volcano made up of alternating layers,lava and ash
9. a mixture of hot steam, ash, rock and dust
11. an instrument that detects waves caused by an earthquake
15. the point on the earths surface directly above the focus of an earthquake

1. when two plates move apart
3. develops above a plume
6. plates that move towards eachother
7. hot fluid within the earths crust
8. pyramid an earthquake proof building in San Francisco
10. plate a section of the crust of that makes up the Earth's landmasses
12. the movement of the edge of a plate of the earth's crust into the mantle beneath another plate
13. the sudden shaking of the ground which release energy
14. a volcano that is temporarily inactive