Earthquake

proshocks

preshock

aftershocks

minimaximal shocks

Longitudinal waves

Transverse waves

Seismic waves

Typanic waves

3

4

5

6

frequent civil activities

frequent explosive activities

frequent deforestation activities

frequent volcanic activities

2

4

5

10

3

4

5

2

3

4

5

2

crustal plates

mantle plates

coral plate

volcanic beds

people don’t feel earthquake

poor buildings collapse

building and bridges collapse

people feel the tremor and windows rattle

inner core

outer core

upper mantle

lower crust