ESS102H1 Lecture Notes - Plate Tectonics, Oceanic Crust, Biogeochemical Cycle
Document Summary
Most large tsunami"s occur at subduction zones (narrow strip of earth"s lithosphere where one tectonic plate moves beneath another). Volcanic eruptions and earthquakes are the result of internal forces explained by plate tectonics: most earthquakes and active volcanoes occur at boundaries b/w plates. The processes we consider to be hazards are derived from the internal heating of the earth and heat from the sun. Hazard natural process that threatens human life. Risk probable severity that destructive event will occur multiplied by the likelihood the event will impact people. Disaster/catastrophe events that cause serious injury or property damage. Mitigation used by scientists and planners to describe efforts to prepare for disasters and minimize their effects. Floods, hurricanes, earthquakes, volcanic eruptions, and large wildfires are most likely to create catastrophes. Geologic cycle - processes that produce the mineral resources, fuels, land, water, and atmosphere we require for survival. The cycles include: the tectonic cycle the rock cycle the hydrologic cycle.
