Class 6b: Earthquakes. Earthquake basics Stress relief via crust movement 500,000 per year; 800 felt.

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Presentation transcript:

Class 6b: Earthquakes

Earthquake basics Stress relief via crust movement 500,000 per year; 800 felt

Earthquake basics Hypocenter: Epicenter:

Earthquake energy Waves of energy traveling through the earth Primary or P-wave

Earthquake energy Secondary or S-wave

Richter scale Measures magnitude via amplitude (height) of the seismic waves

World’s largest quakes Always at subduction zones

California’s largest quakes

We’re overdue! Can’t yet predict quakes, but…

Earthquake effects "Earthquakes don't kill people, buildings do“

Tsunamis Land displaced underwater (quake or slide)

Tsunami: Sumatra

Tsunamis in the U.S.?