Earthquakes
are a series of vibrations under the earths crust due to the rupture or movement of rocks where underground pressure has been building
Hurricanes
are violent tropical storms with wind speeds over 72 mph. Hurricanes are extremely violent and usually very destructive storm
Storm Surge
is the huge wave produced during a hurricane, usually more violent than the storm itself
Tornado
is a violently concentrated wind storm over land that can be recognized by a long funnel-shaped cloud that is visible due to the condensation and debris it carries
Tsunami
is a very large sea wave produced by an earthquake, volcano, or some other underground/water explosion
Volcanoes
are vents in the Earth's crust through which lava and steam are expelled when pressure builds up. Generally a small hill or mountain is built up with a crater at the top around the vent
Wildfire
is any fire that spreads rapidly and is difficult to extinguish.
Source
http://www.dictionary.com

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