1. Earthquakes

2. San Andreas Fault
The 800-mile (1,300-kilometer) fault runs through western and southern California, dividing the Pacific and North American plates

5. Compression Waves aka P-Waves
Fastest Waves – arrive first (primary waves)
Push – Pull rocks in the same direction as the wave travels
Travel through solids and liquids (Travels through entire earth
Theoretical p-waves travel times

6. Shear waves aka S-waves or Secondary Waves
Body waves characterized by a series of sidewise or shearing movements
causes particles to move at right angles to wave direction
Slower than P-waves
Can travel through solid material only

7.
Animation of p-waves and s-waves

8. Surface Waves Love waves (L-Waves) Rayleigh Waves
Move in two directions as they pass through the surface
Up and Down as well as Side to Side
CAUSE THE MOST DAMAGE TO BUILDINGS

9. 3-D Models

10. Seismograph or Seismometer
instrument that records the intensity and duration of earthquakes and similar tremors

11. Seismogram
The record produced by a seismometer