EOSC 114 Lecture Notes - Lecture 6: Elastic-Rebound Theory, Beno Gutenberg, Linear Elasticity
20 Apr 2018
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Document Summary
Elastic rebound how faults store and release energy. Earthquakes: elastic rebound after cool, brittle rocks break. The waves produced by elastic rebound after cool, brittle rocks break in the lithosphere (mostly in the upper lithosphere or crust) Usually caused by forces from plate tectonic movement/motion. Describe the motion and speed that different types of elastic waves travel through the earth or over its surface: Body waves (compression (p) and shear (s)) Explain why shear waves cannot propagate through fluids while compressional waves can. After cool, brittle rocks break in the lithosphere (mostly in upper lith. or crust) Usually caused by forces from plate tectonic motion. Elastically deformed crust rebounds and vibrates, waves propagate away in all directions. Earthquake magnitude: a quantitative measure of the size of an earthquake. Earthquake magnitudes define the amount of shaking or ground motion the amount of ground motion is related to the amount of energy released. Magnitude (energy released) affects everything else abt earthquake hazards.
