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Geography(1.4) - Coggle Diagram
Geography(1.4)
Earthquakes
Definition
Sudden shaking of land
Releasing energy
In wave form
P wave
Fastest
Used for EEW
S wave
Slower
Main cause of damage to buildings etc
Key words
Focus(震源)
Source of the seismic wave
Epicenter/Epicentre(震央)
Point on the surface above focus
Seismic wave(震波)
Measuring method
Richter scale(黎克特制）
Based on amount of energy released
Mercalli
Based on damage
Cause
Convergent Plate Boundaries
Force V.S. Friction
More often earthquakes
Deep earthquakes occur during subduction
Divergent Plate Boundaries
Generally shallower earthquakes
Causes more damage
Force V.S. Rock strength
Others(Faults etc)
Can occur anywhere
Transform plate boundaries