Geography: Earthquakes

Earthquake revision cards

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  • Created by: Rebcca
  • Created on: 02-05-12 14:27

What is an earthquake?

shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity.

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What is the focus of an earthquake?

The point WITHIN the Earth's crust where an earthquake starts

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What is the epicentre?

the point on the Earth's surface directly above the focus of an earthquake

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What is the Richter scale?

A scale that rates an earthquake's magnitude based on the size of its seismic waves

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What is the Mercalli scale?

a scale that rates earthquakes according to their intensity and how much damage they cause at a particular place

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What are Longditudinal waves?

Longitudinal waves Cause an up and down movement

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What are Transverse waves?

Transverse waves Cause a side to side movement

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what are Primary waves?

Primary waves travel faster than secondary waves

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What is a seisometer?

Seismometer Instrument used to measure horizontal or vertical motion during an earthquake

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Constructive margins?

Constructive margin earthquakes are weaker in strength

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Destructive and conservative margins?

Destructive and conservative margin Earthquakes are stronger in strength

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nice little bit of work here...:)

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