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66132
The Philippines- Disaster Hotspot
Description
A-Levels Geography (World at risk) Mind Map on The Philippines- Disaster Hotspot, created by Jodie Goodacre on 01/05/2013.
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geography
world at risk
geography
world at risk
a-levels
Mind Map by
Jodie Goodacre
, updated more than 1 year ago
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Created by
Jodie Goodacre
over 11 years ago
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Resource summary
The Philippines- Disaster Hotspot
Southeast Asia
Above the equator in the tropic of cancer
Made up of 7,107 islands
Latitudes between 5 and 20 degrees North of the equator
Lies in a belt of tropical cyclones
Lies across the Eurasian plate and the Philippines plate boundaries
Destructive plate boundary
Oceanic plate subducted
In the Pacific ocean
North of Indonesia
South of Taiwan
East of Vietnam
Within the 'Ring of Fire'
Disaster hotspot
Prone to Earthquakes and Typhoons
73rd largest independent nation
Over 186,000 sq. miles in size
Topography of the islands is mostly mountainous with narrow to large coastal lowlands
Divided into three main geographic areas : Luzon, Visayas and Mindanao
Highest mountain is Mount Apo at 2,954 meters in height
The Philippines deepest point is the Philippine Deep at 10,057 meters below sea level
Approx, 1,000 of its islands are populated and less than 50% of these are larger than 2.5 square kilometres
Eleven islands make up 94% of the Philippine landmass
Has one of the longest coastlines of any nation in the world
Most Filipinos live on or near the coast
Earthquakes
Earthquakes are very violent
May go up to 9.0 on the Richter scale
The Philippines plate is subducted beneath the Eurasian plate causing vast amounts of friction
100% of the Philippines is at risk from Earthquakes
Moro Gulf Earthquake
August 17th 1976 at 00:11 local time
Magnitude 8.0
Tsunami warning was given
Major aftershock of 6.8
Many smaller aftershocks
Death toll of a recorded 5,000 but possibly up to 8,000
A massive tsunami devastated 700km of coastline
10,000 injured
90,000 homeless
Waves from tsunami reached 4-5 meters
The tsunami was responsible for 85% of deaths, 65% of injuries and 95% of those missing
Volcanoes
Explosive and destructive
As the Philippines plate sinks below the Eurasian plate it melts due to the direction in the subduction zone.
The crust becomes molten called magma which is then forced to the surface
Composite volcano
At destructive plate boundaries the lava is viscous and it cannot flow very far from the volcanoes vent
Steep sided
The volcanoes erupt violently because the rapidly hardened rock blocks the vents and allows pressure to build up under the blocked vent
Volcanoes can lead to dangerous lahars
Mount Pinatubo
June 1991
Biggest eruption globally in over 50 years
Had been dormant for 500 years
First sign wwas 16th July 1990 when a magnitude 7.8 earthquake struck 60 miles northeast of Mount Pinatubo
In March and April 1991, magma started rising towards the surface from more than 20 miles beneath Pinatubo.
Many thousands of tons of noxious suphur dioxide gas were emitted
A 10km exclusion zone was set up around Pinatubo by government advisers who eventually extended this to 30km
Two weeks before the eruption the government produced a video outlining the risks of pyroclastic flows and lahars
On June 7th 1991, the first magma reached the surface butmerely oozed from the vent
June 12th was the first big explosion
June 15th a huge eruption took place ejecting more than 5 cu. kms. of volcanic material
Ash clous rose 22 miles into the air
Volcanic deposits filled deep valleys as much as 660ft. thick
The eruption removed so much magma and rock that the summit collapsed to form a large volcanic depression or caldera 1.6 miles across
Caused global temperatures to drop about 0.5 degrees temporarily
20,000 people displaced
200,000 people evacuated
847 people died
4,300 people died and were injured
Economic losses were US$710 million
Typhoons
Lies within a major typhoon belt
Susceptible to tropical storms
Affected by 15 typhoons and struck by around 5 or 6 a year
Begins over warm water (26 degrees)
Between latitudes of 5 and 20 degrees
70m deep minimum
Coriolis effect needed
Dissipates as it moves over land
Can lead to landslides
High winds and rainfall
Typhoon Bopha (Pablo)
Strongest tropical cyclone to ever hit the southern Philippine island
Category 5 super typhoon
Winds of 160mph
Originated unusually close to the equator
December 4th 2012
Affected more than 213,000 people
More than 179,000 people were in evacuation centers
The death toll reached 1,067
850 people still missing in February
Floods and landslides caused major damage
Landslides
Guinsaugon
Central Philippines
10:30am on 17th February 2006
Cliff face along the Philippine fault collapsed
Up to 10 smaller landslides had occurred in previous weeks
Buried a local elementary school killing 245 students and 6 teachers - only 1 child and 1 adult were saved
Killing around 1,150 people
Engulfed the village covering 3km sq.
A 2.6 magnitude earthquake may have triggered the slide
Unseasonable torrential rain linked to La Nina
Relief efforts hampered by blocked roads and lack of heavy equipment
Tsunamis
The Northern and Eastern coasts face the Pacific Ocean - the most tsunami prone in the world
The great size of the Pacific ocean and the destructive earthquakes combine to produce deadly tsunamis
In less than a day, these tsunamis can travel from one side of the Pacific to the other
People living near areas where large earthquakes occur may find that the tsunami waves will each their shores within minutes of an earthquake
Lower middle income country with a GDP of $5,000 per capita
18th fasted development rate with an average 18.5% annual increase
HDI of 0.75
Uncontrolled deforestation
Destroying natural protection along the coasts
Population has more than tripled since 1948 from 19 million to 92 million in 2009
Population growth stood at 2,02% from 1995 to 2000
Rapidly increasing young population
15-64 year olds make up 59% of the population
Under 15s make up 37% of the population
Over 65s make up only 4% of the populaiton
Median age is 22.2 based on 2010 statistics
High population density - 240 people per km sq. on average
In Megacity Manila this number is 2,000 people per km sq.
On a scale of 1-7 - with 1 being extremely underdeveloped and 7 extensive and efficient by global standards - roads in the Philippines scored a low 3
By 2002, 89.1% of the population had access to electricity and then 93.7% in 2005
Poor roads and infrastructure
41.3% mobile users in 2005
4/100 people use landline phones - 2005
Access to quality water sources is relatively high at 85% in 2002
Access to improved sanitation facilities, was at 73% in 2002
The number of people living on less than $1 a day remained constant over the 1981-1995 period
Disaster preparedness in schools - educating schools
Early warning, forecasting and monitoring systems have been improved
El Nino Drought
February 2010
2.5 million metric tonnes of rice and corn were lost
800,000 hectares of fields effected
Economic losses of US$33 million
Government provided 6,000 water pumps
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