Zusammenfassung der Ressource
Occurance of Earthquakes
- Plate
Tectonics (Theory)
- lithosphere consists of large, rigid sections called
plates
- Convection Currents - driving
force
- Earthquakes
- Sudden release of energy on earths
surface
- vibrations or
shocks
- Plates
- Jam or stick
together
- build up of stress in
rocks
- stress releases - plates
slip
- seismic
waves
- Shallow
Focus (<70km)
- passive
boundaries
- Pacific and N.
American
- smaller magnitude
than deep focus
- account for 75%
of earthquakes
- Deep Focus
(300km)
- convergent
- heaviest plate is
subducted
- Indian and
Eurasian