Earthquakes and Volcanoes

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Presentation transcript:

Earthquakes and Volcanoes Seismic Hazards

Ring of Fire

Ring of Fire Earthquakes and volcanoes are not distributed randomly- they occur in specific regions- usually along a zone where plate boundaries meet Ring of Fire-zone along the Pacific Ocean that rings it, where earthquakes and volcanoes are the most common/active

Seismic hazards Tsunamis: giant wave generated by a slip in the earth’s surface and thus an earthquake http://highered.mcgrawhill.com/olcweb/cgi/pluginpop.cgi?it=swf::640::480::/sites/dl/free/0072402466/30425/16_19.swf::Fig.%2016.19%20-%20Formation%20of%20a%20Tsunami Building collapse, fires, water main breaks, gas main breaks result Liquifaction-occurs when ground saturated with water actually flows like a liquid with intense shaking

Volcanic Hazards Lava, ash is deadly Mudflows or larhars are deadly Toxic gases Pyroclastic bombs, explosions are deadly Cause acid rain Landslides Even though violent, lead to fertile soil

Seismic Risk Map (USA)