Natural disasters

3. An instrument that responds to ground noises and shaking such as caused by quakes, volcanic eruptions, and explosions
5. A sudden movement of the earth's surface that often follows an earthquake and is less violent than the first main movement
8. A strong wind in a desert carrying a large amount of sand
11. A dangerous wind storm; a tornado
12. A violent wind that has a circular movement, found in the West Pacific Ocean
13. A sudden movement of the Earth's surface, often causing severe damage
17. A mass of wet earth moving suddenly and quickly down a steep slope
19. A scale to measure the intensity of earthquakes.

1. A movement of rocks and soil down a mountain or hill
2. An extremely large wave caused by a violent movement of the earth under the sea
4. A situation in which a lot of water covers an area that is usually dry, especially when a river becomes too full
6. A violent storm with very strong winds
7. A fire burning in the bush that is difficult to control and sometimes spreads quickly
9. A long period when there is no rain and people do not have enough water
10. A storm with strong winds and snow
12. Fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism.
14. A large amount of snow that falls down the side of a mountain
15. A powerful fire that burns out of control across a large area
16. A strong, dangerous wind that forms itself into an upside-down spinning cone and is able to destroy buildings as it moves across the ground
18. An occasion when a volcano explodes, and flames and rocks come out of it, or the act of doing this