Volcano

• Tsunami


  Displacement of the seabed during an earthquake resulting in a large wave
• Tsunamis are caused by the displacement of the seabed during an earthquake
• Volcanoes have a volcanic vent
• Hazard


  • Lava flow - A moving mass of lava travelling from a volcano
  • Pyroclastic flow - A dense, destructive mass of hot lava, ash and gas ejected from a volcano moving at high speed
  • Ash cloud - A giant mass of volcanic ash propelled into the atmosphere during an eruption
  • Volcanic bombs - A giant, solidified lump thrown out by a volcano
• Composite (Stratovolcano)


  • Destructive boundary
  • Steep sided cone shape
  • Thick, sticky lava cools quickly
  • Explosive eruption with ash and pyroclastic flows
• Shield Volcano


  • Constructive boundary
  • Gentle slopes, low wide cone
  • Runny lava flows long distances
  • Eruptions are oozing
• Seismometer


  Measures seismic activity
• Volcano


  CO2 and 30% rise to surface indicating eruptions
• Tsunami warning


  Buoys detect changes in sea level
• Hazard mapping


  Highlights areas affected by tectonic activity
• Exclusion zones


  Limited access and development in hazardous areas
• Volcanic ash can be transported over long distances by wind, causing environmental damage and health hazards.