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2700493
Disaster Hotspot Case Study - California
Description
GCSE Geography Mind Map on Disaster Hotspot Case Study - California, created by hawkage83 on 11/05/2015.
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physical geography- world at risk
geography
gcse
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hawkage83
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olw-1234
over 9 years ago
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Resource summary
Disaster Hotspot Case Study - California
Disaster hotspot is an places at risk from 2 or more hazards
Earthquakes
The San Andreas fault line runs the length of California which is a conservative plate boundary
Occur when pressure between the plates build up and then suddenly released and jerk past each other
California has 2 or 3 earthquakes that can damage buildings each year
Chance of a 7.0 earthquake to hit San Franciso bay by 2025
Droughts
Caused by anticyclones. Dry sinking air means no rain
Also caused by La Nina events which means less evaporation so there's less precipitaion
Increased wind blowing westward from desert areas
California suffers from wildfires during droughts which spread quickly over wide areas
2007 wildfires killed 22 people and destroyed 1300 homes
Tsunami
Series of large waves in a coastal area
Caused by earthquakes on the sea bed
Earthquake under the pacific ocean causes a tsunami in California
Landslides
Occur on unstable steep slopes
Caused by earthquakes
Risk is high in California because of building on and around steep slopes
Volcanoes
Hasn't been one in California since 1915
Volcanoes being monitored
Parts of California are vulnerable
70% of California live with in 50 km of the fault line
There are buildings on unstable land which causes increased risk of landslides
20% of residents live below the poverty line
Big economy so huge economic loss when a disaster happens
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