GG231 Lecture Notes - Lecture 2: Foreshock, Geochemistry, Seismic Gap
Document Summary
Module 1 risks and disasters arising via geological processes. Haiti in 2010, m 7. 0 with 240, 000 deaths and 300, 000 injured. Processes and causes related to the sites where there is rupture and movement of rocks, often along a fault, then the force is carried through and on the earth"s surface by seismic waves. Faults (i. e. san andreas fault in cali: buildup of pressure that is released causing quake, connection between 2 rock masses along a fault line can move or slip, slide or thrust, point of origin, focus, hypocenter, epicenter. Don"t know concentrations or levels of the chemicals. Need to be more proactive instead of reactive. Natural service functions: natural environment benefits, creation of new surface = nutrient rich soil or new habitats, increases biodiversity or decreases it, earthquakes benefit: groundwater and energy resources, mineral resources, and landform development. 3 types of earthquakes: strike-slip, thrust, normal fault and intraplate (less common and more dangerous)
