FINDING THE EPICENTER OF AN EARTHQUAKE

Focus vs. Epicenter

Svaha (The other 5 second rule)

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.

Lightning and Thunder P-Waves and S-Waves

Triangulation

Safety Compass (1cm = 10 mm)

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

Game 3 of the World Series

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