Earthquakes

A detailed Summary of Earthquakes


· Cause by movements of the tectonic plates around earth crusts

· Most of them occur at boundaries of these plates. Ex. San Andres fault in California

· 50% occur art sub duction zones concentrated along the ring of fire

· In a volcano it could have more than a 100 earthquakes a day before an explosion

· originate as magma work its way upward

· pumping of waste fluid as it happened in Colorado

Ø RICHTER SCALE ( American Francis Richter 1930,s)

· It is a logarithmic scale runs from


· A magnitude 9.5 is now consider a practical limit

· Once the shaking has stopped, proceed with caution. Bridges and ramps may have been damaged during the shaking.



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Approximate Word count = 520
Approximate Pages = 2 (250 words per page double spaced)

Category: Science

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