Disaster hot-spots: the Philippines & the California coast.

California & Philippines case study key facts.

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  • Created by: gina
  • Created on: 17-05-12 09:01

The Philippines General facts & why it's a disaste

  • An arc island in south east Asia.
  • Made up of 7,000 islands.
  • Population of 91 million in 2007
  • Lies in typhoon belt.
  • Astride an active plate boundary
  • On a destructive plate boundary - the philippines plate is being subducted beneath the eurasaian plate.
  • Tropical monsoon climate - heavy rainfall.
  • Prone to landslides due to combination of heavy rainfall, deforrestation and flooding.
  • Lower middle income country.
  • Average population densities - 240 people per km2 - high.
  • Population density for megacity malina - 2,000 peopler per km2
  • Vunerable population- poor & live near the coast.
  • Vunerable to locally generated tsunamis and typhoon-generated storms.
  • 74% of it's population is vulnerable.
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Mount Pinatubo - 12th June 1991

  • Biggest eruption in 50 years - in the world.
  • 10km eclusion zone set up around Pinatubo which was then extended to 30km.
  • Two weeks before erruption, they produced a video outlining risks of pyroclastic flow and lahars.
  • By 9th of june 1991 - 58,000 people evacuated. Reaching 200,000 by 12th june.
  • First erruption 12th june 1991 caused a cloud of ash 20km into the atmosphere.
  • Second erruption 15th june 1991 - dome on the side of the volcano collapsed, creating pyroclastic blast and huge lahars.
  • Death and injury toll just 4,300 people.
  • 350 people died, including 77 in the lahars that occured.
  • Some evacuees died in camps - exposed to disease.
  • 80,000 hectares of farmland buried by ash - disrupting livelihoods of 500,000 farmers and their families.
  • Economic losses of $710 million - agriculture and property mainly.
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Management & forecasting.

  • National Disaster co-ordinating council.
  • Philippine  atmospheric,geogphysical and astronomical services.
  • Philippine institute of volcanology and seismology.
  • Land-use planning and building regulation, and structural progrrammes of defences help people to survive the huge range of hazards facing them.
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The California General facts & why it's a disaster

  • population of nearly 40 million.
  • 6th largest world economy.
  • per capita incomes of over $65,000.
  • suffers from : earthquakes,river flooding,coastal flooding,drought,wildfires/bushfires,landslides/mudslides/fog and smog.
  • Hazard zone concerntrated around san andreas fault.
  • Ifluencing factors: Plate techtonics and climate patterns (El Nino & La Nina)
  • San Andreas fault - conservative plate boundary.
  • Conservstive plate boundary between - North american plate and pacific plate.
  • El Nino - increases sub-tropical storms - increased landslides.
  • La Nina - increases drought - increases risk of bushfires.
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1994- Northridge earthquake LA

  • 17th of January 1994 4:31 am.
  • Magnitude - 6.7.
  • Many thousands of aftershocks during following weeks - causing more damage.
  • 57 people died, 1500 were seriously injured.
  • 9000 homes and businesses with out electricity for several days.
  • 20,000 homes and businesses without gas.
  • 48,500 people without water.
  • freeways damaged - causing 30km of traffic.
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Management and forecasting.

  • Insure properties against earthquake damage.
  • Educated in schools.
  • Quick evacuation programmes.
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Comments

Seve22

Good basic information but more detail would be useful.

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