© Boardworks Ltd 20151 of 8

Haz

ard

Ris

k an

d Vu

lner

abili

tyH

azar

ds

© Boardworks Ltd 20152 of 8

Where in the world?

© Boardworks Ltd 20153 of 8

Which hazards are the most common?

© Boardworks Ltd 20154 of 8

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.

© Boardworks Ltd 20155 of 8

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

Hazard trends

© Boardworks Ltd 20156 of 8

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

© Boardworks Ltd 20157 of 8

Hazard hotspot: Philippines

© Boardworks Ltd 20158 of 8

Want to see more?

This is only a sample of one of hundreds of Boardworks Geography presentations.

To see more of what Boardworks can offer, order a full presentation completely free:

www.boardworks.co.uk/geographypresentation