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definition for magnitude, frequency, distribution

Hello, could someone give me a good definition for these key words? Its for my hazards exam paper.


thank you.
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toto8462
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Magnitude - The size of the hazardous event. e.g. Richter scale for earthquakes, Saffir Simpson for Hurricanes/Tropical cyclones/Typhoons etc.

Frequency - How often the event occurs in a given time frame. i.e. it is usual to expect 3 major hurricanes in the Atlantic hurricane season.

Distribution - The spatial variation in the hazardous events.

They may be breif, but they are punchy and to the point. Exactly what you want in an 1:20 hr exam.

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