Effects of Earthquakes
- Created by: Charlie Davies
- Created on: 19-05-14 14:26
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- Earthquakes
- Distribution
- Earthquakes usually happen around plate boundaries
- the most destructive occur at destructive faults especially if there is a subduction zone
- also at transform faults such as the San Andreas fault
- the most destructive occur at destructive faults especially if there is a subduction zone
- Can also happen away from plate boundaries and are associated with the reactivation of old fault lines
- e.g. 2002 Dudley Earthquake
- Human activity
- deep mine working
- Fracking
- Extreme building
- Earthquakes usually happen around plate boundaries
- Measuring Earthquake
- Richter Scale
- logarithmic scale
- each point represents a ten-fold increase in the amount of energy involved
- measured using a seismograph
- scale of 1-10
- Mercalli Scale
- Measures intensity of the event
- based upon the impacts
- scale 1-12
- the Richter scale and Mercalli scale DO NOT math up exactly and event 12 on the Mercalli Scale, is only a 8.5 on the Richter Scale
- Richter Scale
- Effects of Earthquakes
- Primary
- Ground Shaking
- Secondary
- Landslides & avalanches
- Soil liquefaction
- high water content in the soil looses mechanical structure and behaves as liquid
- Collapse of buildings/transport systems
- Flooding
- dam bursts, ground water, mains water
- Fires
- ruptured gas mains and fallen pylons
- Disease & food shortages
- Destruction of water,gas & electricity provisions
- Tsunamis
- Untitled
- Primary
- Distribution
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