© boardworks ltd 2015 1 of 8 hazard risk and vulnerability hazards

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Where in the world?

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Which hazards are the most common?

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Magnitude and frequency

The laws of probability tell us that everyday events occur often (with high frequency) and are moderate in size (magnitude).

Hazard events tend to have a low frequency but are large in magnitude.

Hazard magnitude and frequency are interrelated:

A river may flood a little every year, but a devastating flood may only occur every 50 years.

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The number of reported disasters has increased rapidly since the 1960s. Why do you think this is?

Hazard trends

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Where are hazard hotspots likely to be located?

Hazard hotspots

Hazard hotspots are multiple hazard zones. These areas are highly exposed to two or more hazards.

Country % of land area at risk from

hazards

% population at risk from

hazards

Maximum number of

hazardsTaiwan 73 73 4

Costa Rica 37 41 4Philippines 22 36 5Guatemala 21 41 5

Ecuador 14 24 5Chile 13 54 4Japan 11 15 4

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Hazard hotspot: Philippines

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