ERTH 20 Lecture Notes - Lecture 24: Fault Scarp, Seismic Wave, Longitudinal Wave
2 Dec 2020
School
Department
Course
Professor
Document Summary
Wave-propagating disturbance earth quakes energy-propagates as seismic waves (speed of sound) light wave and other electromagnetic waves. Examples: water wave- visbible, sound- non visible takes certain amount of time. Seismic waves- generated by earthquake energy; movement on fault releases. Elasticity- bending something and then it goes back to its original shape. You can take something and bend it past its elastic limit- when it breaks. Elastic rebound model- stress building up and then rupturing. Precursor- an event before rupture; without precursors there"s no way to predict. Horizontal compression- (convergent plate boundries) called thrust fault. Fault characteristics- where fault meets land called fault trace. During an earthquake the ground shakes and : P wave-first wave; travels the fastest; compressional wave; travel in solid,liquid and gas. S wave-second wave; bigger amplitude, move in snakelike pattern, only travel in solids. Surface waves- biggest amplitude over all; last for a long time; causes the most damage.
