earthquake - a sudden movement of the Earth's surface, often causing severe damage, volcanic eruption - happen when lava and gas are discharged from a volcanic vent., avalanche - a large amount of snow that falls down the side of a mountain, bush-fire - a fire burning in a wild area of land that is difficult to control and sometimes spreads quickly:, drought - a long period when there is little or no rain:, flood - a large amount of water covering an area that is usually dry, hurricane - a violent wind that has a circular movement, especially in the West Atlantic Ocean, tsunami - an extremely large wave caused by a violent movement of the earth under the sea, landslide - a mass of rock and earth moving suddenly and quickly down a steep slope, lightning - a flash of bright light in the sky that is produced by electricity moving between clouds or from clouds to the ground, tornado - 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,

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