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What they are and how they work

Raymond Smith

on 9 February 2011

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Transcript of Earthquake

What are Earthquakes An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves. How do they Start?

Earthquakes most commonly occur at the boundaries of tectonic plates where stresses accumulate in the earth's crust over time, causing energy to be stored in the form of elastic strain

Earthquakes travel in different forms of waves. When an earthquake strikes, the first wave to travel is the P-wave, which stands for primary waves. It moves in a motion that goes back back and forth horizontally like a spring. S-waves follow after P-waves. How do Earthquakes travel How do Earthquakes Measure? There are two ways in which scientists quantify the size of earthquakes: magnitude and intensity. Recent Earthquakes as of 2/8/11 Time Magnitude Location
2 hours ago 5.5 Bonin Islands, Japan region
11 hours ago 4.7 Off the coast of Oregon
23 hours ago 6.2 Solomon Islands

From, Raymond Smith
Class, Earth Science
Teacher: Mr Lattanzio Earthquakes Raymond Smith
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