EESA06H3 Study Guide - Megacity, Landslide, Richter Magnitude Scale
6 Apr 2013
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Document Summary
Hazard - any natural process that threatens human life or property; the process itself is not a hazard, rather, it becomes a hazard only when threatening human interests. Risk - the probable severity that a destructive event will occur multiplied by the events likely impact on people and property; risk thus integrates hazard and social vulnerability. Disaster - an event that causes serious injury, loss of life and property damage over a limited time and within a specific geographic area ( ex scope can be regional , national ) Magnitude frequency concept - large disaster is uncommon, small hazard is frequent ( ex earthquakes ) Low viscosity - ( thin like water ) magmas flow more rapidly and form lava flows that cover thousands of square kilometers ( e. g. basaltic magma at hot spots or mor ) Low viscosity magma allow gases to easily, they are not violent eruption.
