A natural disaster can be defined as an unmanageable extreme destruction that results in environmental and financial damage and casualties to the unprotected population. Sometimes events can be predicted using special weather warning systems, and often they occur in the same geographical area, because they are related to the climatic and physical characteristics of the region. For example, Florida is constantly affected by tornadoes and hurricanes, and Japan – by earthquakes.
An earthquake occurs when the earth's tectonic plates move and violently shake the terrain. According to the Richter scale, the magnitude of earthquakes is measured from 1 to 10 points. The most powerful earthquake was recorded in 1960 in Chile, its magnitude was 9.5 points.
Volcanic eruptions occur when hot red magma erupts from the earth's crust and flows out of the top of a volcano. It also releases volcanic ash into the air, which is harmful to the breathing of people and animals.
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