Finding the Epicenter of an Earthquake

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Presentation transcript:

Finding the Epicenter of an Earthquake

Focus vs. Epicenter

Svaha (The other 5 second rule) Lightning and Thunder P-Waves and S-Waves A general rule of thumb: For every 5 seconds of time between the lightning and the thunder the storm is about 1 mile away. For example if you see the lightning and count to 10 and then hear the thunder the storm is about 2 miles away. (10 seconds ÷ 5 = 2 miles) The P-Waves would be like the lightning because the P-Waves are faster and the S-Waves are like the thunder because the S- Waves are slower. The longer the time interval between the P- Waves and the S-Waves the further away the epicenter.

Triangulation

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The Loma Prieta Quake Oct. 17, 1989 San Francisco Bay Area (California) Magnitude of 6.9 on the Richter Scale 63 casualties with thousands of injuries Main shaking lasted 10-15 seconds What (specifically) most probably caused this quake?

Some major damage

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