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Transcript 
1. Plate tectonics
1.1 Structure of the Earth
1.2 Plate Boundaries
1.2.1 Transform Boundaries
1.2.2 Divergent Boundaries
1.2.3 Convergent Boundaries
2.
3.
4.
5.
6.
7.
8.
Volcanoes
Earthquakes
Tsunami
Tornadoes
Hurricanes
Disaster risk management
Japan earthquake / tsunami
Continential Crust
Oceanic Crust
Thickness
25-70km
7-10km
Density
2.7 g/cm³
3.3 g/cm³
Transform Boundaries
Plates slide past each other
along boundaries
Sinistral (left side toward the
observer)
Dextral (right side toward the
observer)
Divergent Boundaries
Plates slide apart from each
other
Convergent Boundaries
Plates slide towards each other
Subduction zone (ocean plate
slides under continental plate /
ocean plate)
Obduction zone (continental
plate slides under oceanic
plate, rare)
Continental collision / Orogenic
belt (continental plates collide)
1. Mount Tambora, Indonesia
• 1816 – Death Toll: 92000
2. Mt. Pelee, West Indies
• 1902 – Death Toll: 40000
3. Mount Krakatoa, Indonesia
• 1883 – Death Toll: 36000
Risk
assessments
Emergency Management
o
o
o
o
Mitigation
Preparedness
Response
Recovery
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