Earthquake By Eliza Tuttlebee &Megan Manship. Named earthquakes.

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Presentation transcript:

Earthquake By Eliza Tuttlebee &Megan Manship

Named earthquakes

Causes of earthquakes Causes An earthquake is the shaking and vibration of the Earth's crust due to movement of the Earth's plates. Earthquakes can happen along any type of plate boundary. Earthquakes occur when tension is released from inside the crust. Plates do not always move smoothly alongside each other and sometimes get stuck. When this happens pressure builds up. When this pressure is eventually released, an earthquake tends to occur. The point inside the crust where the pressure is released is called the focus. The point on the Earth's surface above the focus is called the epicentre. Earthquake energy is released in seismic waves. These waves spread out from the focus. The waves are felt most strongly at the epicentre, becoming less strong as they travel further away. The most severe damage caused by an earthquake will happen close to the epicentre.

number of deaths caused in an earthquake Up to 100,000 people may have died in the Haiti earthquake the total deaths in the japan earthquake was 15,782 people. There was 4086 people missing. 5,932 people injured. Number of fisherman boats sunk or damaged was over 22,000. Over 300 ports were damaged as well.

Effects of an earthquake Clearing rubble after an earthquake, Bhuj, India Earthquakes can destroy settlements and kill many people. Aftershocks can cause even more damage to an area. It is possible to classify the impacts of an earthquake, by taking the following factors into account: short-term (immediate) impacts long-term impacts social impacts (the impact on people) economic impacts (the impact on the wealth of an area) environmental impacts (the impact on the landscape)