2. Add To Table of Contents
Wave Scales Pg. 28
Seismic waves Pg. 29

3. Seismic Waves Pg. 29 Seismology is the study of earthquakes.
Seismograph- instrument that records seismic waves.

4. Seismic Waves 1. P waves- Fastest waves, first to be detected.
Body waves-travel through the earth’s interior.
1. P waves- Fastest waves, first to be detected.
Move back and forth parallel to the motion of the wave.
Move through solids, liquids and gases.

5. 2. S waves - Second fastest
Move perpendicular to motion of wave.
Move only through solids

6. Surface waves-travel along the earth’s surface.
Slowest moving waves
Cause the most damage during earthquakes
1.Love(L) waves move rock up and down and side to side.

7. 2. Rayleigh waves - move with a rolling motion(like a typical wave)

8. Shadow zone – area on Earth’s surface where no seismic waves from a particular earthquake can be detected.

9. Measuring Earthquakes
Magnitude- strength of an earthquake.
Richter scale
Intensity-how much damage an earthquake causes.
Mercalli scale

11. Attach pictures to page 26