Earthquakes

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created 5 years ago by EDoherty
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updated 8 months ago by EDoherty
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1

What is an earthquake?

Earthquakes are the shaking, rolling or sudden shock of the earth’s surface.

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Focus

The point deep in the earth's crust where the earthquake begins.

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Epicentre

The epicentre is the place on the earths surface where the effects of the earthquake is most felt. It is directly above the focus. Most damage is done here

4

Where do earthquakes happen?

Earthquakes happen most often in places where plates collide

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How do earthquakes happen?

When plates collide they build up pressure beneath the earth’s crust. When this pressure is released it causes a violent shaking of the earth’s crust.

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What happens when an earthquake happens?

.When an Earthquake occurs shock waves move out from the focus and the epicentre.

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Where is most damage done?

These shock waves are strongest at the epicentre. The most damage occurs to built up areas closest to the epicentre.

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What is the name of the instrument used to measure earthquakes?

A Seismograph

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What is the name of the scale that the earthquake is show on?

Richter Scale

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Damage Done by earthquake

Roads and bridges damaged or destroyed

Houses damaged or destroyed

Fires, gas explosions.

Injury and loss of life.

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Type of aid needed.

Emergency aid in the form of medicine, shelter, clean water ,food..

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What can be done to help reduce the damage done? 3 things

1. Have a good warning system place to alert people in advance.

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2

2. Build brick not wooden houses as these are stronger.

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3

3. Build earthquake proof building, these buildings are built on rollers that move with the earthquake.