Lies on a boundary between
two tectonic plates: the
Philippines and the Eurasian
population densities are
high: 240 people per km2
many are poor and
living on the coast
This makes them vunerable
to locally generated tsunamis
and typhoon generated storm
surges
Mount Pinatubo June 1991
biggest the world had seen for 50 years
sent a cloud of ash 20 km into the air
spread over south east Asia over 3 days
The second eruption on the 15th of June was cataclysmic
a dome on the side of the volcano collapsed
creating a pyroclastic blast and huge lahars
some evacuees died in camps when they were exposed to disease
350 people died including 77 in the lahars
80000 hecters of farm land = buried under ash
disrupting livelihoods of 500000 farmers and their family members
economic losses were US $710 million dollars, mainly agriculture and property
20 million tons of sulfur dioxide were injected into the
stratosphere, and dispersal of this gas cloud around
the world caused global temperatures to drop
temporarily (1991 through 1993) by (0.5°C).
Destructive plate Boundary
The Eurasian plate is subducted underneath the Eurasian, creating the deep manila trench
Plates move as a series of jerks- friction
As the subducted plate melts in the earths mantle, the magma forms a magma chamber
Combines with gasses and becomes explosive
Magma solidifies below the earths surface and produces a solid cap over the volcanoes vent
Pressure grows beneath it
Erupts with huge force
Guinsaugon landslide
February 2006
Mudslide engulfed the village and its land
covering 3km2
killed 1150 people
CAUSE:
unseasonalbe torrential rain
fell for 10 days in February
normally the dry season
LA NINA
cyclic ocean and wind current affecting south East Asia
2.6 magnitude earthquake
HUMAN
Deforestation of native forest cover protecting the soil
50 years logging has reduced several million hectares of forest to about 600000 today