ATOC 185 Lecture Notes - Lecture 1: Richter Magnitude Scale, Convergent Boundary, Logarithmic Scale
7 Oct 2016
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Document Summary
Most earthquakes occur in the ring of fire . Western americas are categorized by these subduction zones. All but one located in ring of fire. Hawaii is in a crappy place for tsunamis. Faults generally a combination of types of fault. Either left-lateral (sinistral) or right-lateral (dextral) according to their movement. Termpaper idea parkfeild,ca every 20-35 years, there is a magnitude 6. 0 earthquake. 1 richter unit difference is x10 for ground motion and x33 for energy. Globally, small earthquakes are more frequent than large. Magnitude is inversly correlated with how oftern they occur. Measures the size of earthquakes in terms of the energy released. Seismic moment: m0 = rock rigidity x area of slip x fault slip. Moment magnitude: mw = (2/3) x logm0 - 10. 7. Measures the effect of the earthquake on structures such as buildings. The value of the scale depends on factors such as proximity and depth of the earthquake.
