Causes of Earthquakes
- Pressure builds up at plate boundaries.
- Movement is prevented by friction between plates.
- Suddenly the crust breaks along a fault.
- Stored energy is released in a few seconds and travels out as seismic waves.
CASE STUDY: PAKISTAN EARTHQUAKE - LEDC
Date: 8 October 2005
Strength: Richter Scale 7.6
Cause: Pakistan is on a collision boundary netween the Indo-Australian and the Eurasian plates.
Effects: 73,000 deaths, 3,000,000 homeless and £3 billion damage estimated cost.
CASE STUDY: KOBE EARTHQUAKE - MEDC
Date: 17 January 1995
Epicentre: Awaji Island, Akashi Straights
Strength: Richter Scale 7.2
Cause: Japan is on a destructive boundary between the Philippine Plate and the Eurasian Plate.
Effects: 5,000 deaths, 300,000 homeless and a £80 billion damage estimated cost.
Effects of Earthquakes
Primary effects are hazards caused immediatly the earthquakes strikes;
- Buoldings collapse, killing and trapping people inside.
- Bridges and elevated roads collapse, crushing…