Pages in this set

Page 1

Preview of page 1
Seismicity
Earthquakes

Earthquakes occur almost continuously over the Earth, with an estimated 18 earthquakes of magnitude 7.0 or
larger every year
When there is a build up of pressure within the Earth's crust the ground shakes violenty, an earthquake
occurs
The point where the release happens is called the focus,…

Page 2

Preview of page 2
`soil volcanoes'. Buildings can `sink' as a result. It is estimated that US$100,000 million worth of
damage was caused by this secondary effect of the 1989 earthquake.

o Landslides and avalanches: Where slope failure occurs as a result of ground shaking

o Human impact: This depends on the population density…

Page 3

Preview of page 3
Prediction

There is currently no reliable way to accurately predict when an earthquake will occur, there are many
methods which include:

-Seismic Records: Studying patterns of earthquakes and using these to predict the next event will occur. The
shockwaves are recorded on a seismometer or seismograph.

-Radon gas emissions: Radon…

Comments

No comments have yet been made

Similar Geography resources:

See all Geography resources »See all resources »