1. Seismic Waves Generate outward from focus

2. P Waves Compress and expand ground Travel fastest – first to arrive at seismic reporting station Travel through solids and liquids Aka – primary waves

3. S waves Shake ground back and forth, vibrating from side to side Travel second fastest – second to arrive at seismic reporting stations Cannot travel through liquids – can only travel through solids Aka secondary waves

4. Surface waves Ground surface rolls with a wavelike (up and down) motion Move more slowly than either p-waves or s- waves - last to arrive at seismic stations Generally cause the most property damage