BIOL 1001 Chapter : Chapter 9 5 And 9 6 Bones
Document Summary
Slip on old fault: fault motion, magma motion. Eruptions: giant landslides, meteorite impacts, humans. Underground nuclear bomb tests: earthquakes, background, causes, faults, slip along faults, seismometer, terminology. Slip on fault occurs when stress exceeds rock strength. Elastic rebound theory => rocks bend over time and stress increases; will cause rocks to eventually break; elastic rocks move back to original shape once stress is released; brittle can break. Uses a pen on the machine which shakes when the ground moves => seismic waves. P-wave => fastest; travels through earth and many materials. S-wave => secondary wave; slower; travels through earth; can t travel through liquid. Surface wave => slowest; travel on surface and causes shaking damage. Mercalli scale => scale to measure earthquake intensity; based on observation of damage. Richter scale => scale to measure earthquake intensity; based on the amount of energy released; measures time between p and s wave arrival; amplitude of largest surface wave.
