You Need the Following:. Papers on the Table SCIENCE BOOK! Sheet of Paper Turn in your Test Self-Assessment Turn in any test corrections. Earthquakes. What is an Earthquake?. Earthquakes : Vibrations (seismic waves) within Earth materials are produced by the rapid release of energy
How Earthquakes Occur
Types of Faults Overview
Originate at the focus and travel outward in all directions
Earthquake waves are recorded by a seismograph and the recording of waves on paper is called seismogram
A seiche is the sloshing of a closed body of water from earthquake shaking. Swimming pools often have seiches during earthquakes.
Ground fissures caused by liquefaction near the mouth of the Pajaro River in California during the 1989 Loma Prieta earthquake. When the surface of the ground oscillates, wet, sandy, and muddy soils can flow like a liquid. This is liquefaction. You can liquefy wet sand at the beach by pumping it up and down with your feet. Photo courtesy of the Loma Prieta Collection, Earthquake Engineering Research Center, UC Berkeley.