21 - Natural Hazards Earthquakes 1906 o o o o 10:50:00...

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Natural Hazards 21/10/2008 11:50:00 Earthquakes 1906 Earthquake in San Francisco o Fire was a major damaging factor o Did not have the necessary water to put out fires o Coping mechanisms – watch the devastation – create art o One of the most mapped disasters Tsunami is a secondary effect Volcanoes – Module 3 Convergent plates – Pacific Ring of Fire 90% is associated with the edges Other 10% is related to hotspots Divergent Plates – seafloor spreading – mid-Atlantic ridge Violent volcanoes occur when an oceanic plate converges with the  continental plate Volcano.si.edu Types of Volcanoes
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Unformatted text preview: o Composite cones (stratovolcanoes) Mount Fuji Violent, large-volume eruptions o Cinder cones Violent, but low-volume o Shield volcanoes Gentle, gradual, eruptions of high volume Oozing magma o Plug domes Potentially explosive and violent • Magmas o Contain dissolved gasses o Gets trapped and held in magma, it can be blasted into the as pyroclastic flow (weakness in the side, Mont Pelee 1902 and Mount St. Helens 1980) • Size and character o Vary with the quantity of magma o Gas build up o Viscosity caused by silica 21/10/2008 11:50:00 ← 21/10/2008 11:50:00 ←...
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  • Summer '07
  • Curtis
  • Volcano, Mount Fuji, secondary effect Volcanoes, major damaging factor, Violent volcanoes

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