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Ruth Butt 13SM

Volcanic Activity:

There are intrusive volcanic features which occur beneath the earth's surface and extrusive features
which occur on the earth's surface where there are major types (e.g. volcanic eruptions) and minor
types (e.g. geysers and springs).

Once magma erupts onto the earth's surface, it's called lava…

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1. HOT SPRINGS- This is where groundwater emerges at the surface close to an area of volcanic
activity. They have a high mineral content due to dissolved solids, and are popular with
tourists, e.g. the Rio Hondo in Argentina.
2. GEYSERS- When groundwater is heated above boiling…

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Ruth Butt 13SM

Triggered by underwater earthquakes, the movement of the seabed causes large amounts of water
to be DISPLACED which produces large waves. The greater the seabed movement, the more water is
displaced and the bigger the wave.

Volcanic eruptions and landslides can also cause tsunamis. They can travel…

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Ruth Butt 13SM

eruption when citizens don't wish to leave their beloved homes, and believe an earthquake isn't
realistically likely to happen.

Finally, when predicting tsunamis, we rely on earthquake detection systems to allow for
evacuation, however this is reliant on good communication systems, and so if people don't

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Ruth Butt 13SM

The more people in an area the more are at risk of the effects of a disaster. There is a higher risk in
densely populated cities where collapsing buildings poses a risk to life. Evacuating large numbers of
people can be difficult as roads become blocked and…


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