Earthquakes and Volcanoes

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Earthquakes and Volcanoes

• Seismic Hazards

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Ring of Fire
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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

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Seismic hazards

• Tsunamis giant wave generated by a slip in the
  earths surface and thus an earthquake
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  20a20Tsunami
• 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

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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

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Seismic Risk Map (USA)