California's Hazards
- Created by: Hannah Jeffery
- Created on: 07-04-15 11:05
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- California geophysical hazards
- location
- west coast of America
- lies near the pacific coast
- Economic development stage
- America is stage 5 on Rostows scale of development
- America only super power
- GDP of $53,000 per capita
- California has a high GDP of $1.9 trillion
- "take off" was due to the mining industry
- over 600,00 millionaires in the state
- America is stage 5 on Rostows scale of development
- Landslide hazards
- many slopes over 15 degrees
- arid desert like conditions
- highest recording of 57 C
- limiting growth of vegetation which stabilise hillsides
- wildfires leave slopes without protection of vegetation
- seismic activity loosens the soil
- last 25 years they have killed 100 Californian's
- wildfires
- triggered by lightening and made worse by strong winds and parched land
- expensive because hydroplanes used to extinguish fire
- seismic activity
- The san Andreas fault runs along side the west coast of America
- convergent plant boundary
- both pacific plate and north American plate are moving north
- pacific plate is moving at a faster rate
- build up of friction creates stress in the rocks and one plate eventually slips past each other
- sudden release of energy creates an earthquake
- both pacific plate and north American plate are moving north
- convergent plant boundary
- 1906 earthquake 7.8
- buildings were wooden and not designed for earthquakes
- 28,000 buildings destroyed
- 400,000 people made homeless
- $400 million of property damage
- infrastructure damage made recovery difficult
- broken water pipes meant that fires couldn't be put out
- fires cause by broken pipelines burnt for three days
- destroyed water and sewer pipes, railways and roadways
- broken water pipes meant that fires couldn't be put out
- response
- emergency aid provided food. water , tents, blankets and medical supplies
- vigorous research into earthquakes
- development of the seismograph
- creation of geodetic instruments
- allowing regional zoning
- buildings were wooden and not designed for earthquakes
- 1989 earthquake 7.0
- more than 1000 landslides occurred I the Santa cruz mountains
- collapse of infrastructure
- eg The cypris freeway collapsed
- about 1,300 buildings damaged
- government emergency radio system failed
- 63 deaths
- $5.9 billion worth of damage
- responses
- national guard patrolled the streets to stop looting
- $30 billion to rebuild bridges, pipelines and other infrastructure
- Cyprus freeway rebuilt ten years later wit seismic design
- 12,000 people have completed the citizen of Oakland respond to emergencies course
- enables them to survive the first 72 hours without any aid
- The san Andreas fault runs along side the west coast of America
- location
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