Characteristics of Earthquakes

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  • Created by: Lotto65
  • Created on: 22-12-15 14:05
What is the focus of an earthquake?
The point where the earthquake begins
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Where is the focus of an earthquake?
In the crust
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Deep focus earthquakes cause less/more damage
Less
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Deep focus earthquakes are felt less/more
Less
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Shallow focus earthquakes cause less/more damage and are felt less/more
More for both
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What is the epicentre of an earthquake?
The point on the Earth's surface directly above the focus
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What are shock waves?
Seismic waves generated by an earthquake that pass through the crust
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What is another name for shock waves?
Seismic waves
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What is a seismogram?
The line produced by a seismograph which records earthquake activity
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What does the richter scale measure?
The strength of earthquakes
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What does the mercalli scale measure?
The effects/ damage an earthquake has done
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Roughly what is the strength of an earthquake with 3 on the richter scale in comparison to 1?
100 times stronger
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How much stronger is an earthquake of 2 on the richter scale to an earthquake of 1?
10 times
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Is there an upper limit to the richter scale?
No
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What is the scale of the mercalli scale?
I to XII
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On what plate margins do earthquakes occur?
Conservative, constructive and destructive
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Why do earthquakes occur at destructive margins?
Pressure from subducting plate and it melting
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Why do earthquakes occur at constructive margins?
Friction and pressure by plates moving apart
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Are earthquakes at constructive margins more/less severe than those at destructive and conservative?
Less
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Why are there earthquakes at conservative margins?
When plates stick, pressure and stresses build up and this sudden release of built up pressure causes earthquakes as plates release
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Are earthquakes at conservative margins powerful?
Yes
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Other cards in this set

Card 2

Front

Where is the focus of an earthquake?

Back

In the crust

Card 3

Front

Deep focus earthquakes cause less/more damage

Back

Preview of the front of card 3

Card 4

Front

Deep focus earthquakes are felt less/more

Back

Preview of the front of card 4

Card 5

Front

Shallow focus earthquakes cause less/more damage and are felt less/more

Back

Preview of the front of card 5
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