Earthquakes. Earthquakes occur due to the collision, separation or sliding motion of plate boundaries. The point of collision is called the focus point.

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Presentation transcript:

Earthquakes

Earthquakes occur due to the collision, separation or sliding motion of plate boundaries. The point of collision is called the focus point. Seismic or shock waves radiate out from this point, they travel to the surface where they release their energy at the epicentre.

Effects – buildings buckle.

Effects – bridges/roads become unstable. Download Download View on Flickr Report Photo View on Flickr

Earthquakes A seismograph is an instrument that records incoming tremors/ shock waves. A seismologist is a person who monitors earthquake activity. A Richter Scale is used to demonstrate (show) how strong a quake was on a scale of one to ten.