1. Finding the Epicenter of an Earthquake

2. Focus vs. Epicenter

3. 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.

4. Triangulation

5. Safety Compass (1cm = 10 mm)

6. 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 seconds
What (specifically) most probably caused this quake?

7. Some major damage

8. Game 3 of the World Series

9. Helpful Hint for Number 4:

10. Helpful Hint for Number 5:

11. Helpful Hint for Number 6:

12. Helpful Hint for Number 7: