GEOG 1350 Lecture Notes - Lecture 1: Continental Crust, Sea Level Rise, Seafloor Spreading
21 Sep 2017
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Document Summary
Lecture 1 earth hazards and global change. Hazards affect millions of people around the world each year. Within north america, every location is at risk from at least one hazardous process: examples, west coast earthquakes, landslides, east-coast hurricanes, mid-continent tornados, blizzards, all areas drought. Processes and natural hazards: natural hazards can arise from three main processes: Earthquake (haiti), tsunami (japan: earthquakes cause the tsunamis. Magnitude and frequency: the impact of a hazard is a function of both its magnitude (energy released) and frequency. It can also be affected by other factors geology, land use, population density: magnitude-frequency concept***, there is an inverse (negative) relationship between magnitude and frequency, low magnitude=very frequent. Understanding the risk of hazards: the history or an area can provide insight on its risk of hazards, the following provide clues, maps, historic documents, journals, aerial photos, weather and climate data, craters (meteor), faults (earthquakes), valleys (flooding)
