DRR Q4 STEM-11

• Volcano Hazard Maps


  An aerial view of the areas on the ground that could be affected by volcanic activity during and after an eruption

  
• Volcano Hazard Maps are developed so that those who are responsible for the people at risk would be informed about the dangers that would be brought about by a volcanic eruption

  
• Volcano Hazard Maps


  • They show different types of hazards depending on the volcano
  • A volcano may have a different set of hazard maps from another volcano depending on the hazards it generates

  
• Hazard maps for Mayon Volcano


  • Lahar
  • Ashfall
  • Lava flow
  • Pyroclastic flow
  • Floods
  • Landslides

  
• Hazard map color scheme


  • Darker shade = greater danger
  • Lighter shade = lesser danger
• Taal Volcano Hazard Map


  • Shows three hazards: base surge, ballistic projectiles, and lake water oscillation (standing waves)
  • Volcano island with active vent is designated as Permanent Danger Zone
  • Buffer zone is one-kilometer aerial distance from the danger zone limits

  
• Taal Volcano Hazard Map is part of a larger map used by the Emergency Response Coordination Center (ERCC) which shows evacuation centers, affected population, and evacuated people

  
• Volcanic Alert Signals range from 0 to 5 to indicate the status of an active volcano

  
• Volcanic Alert Levels


  0- No Alert, 1- Abnormal, 2- Increasing unrest, 3- Increasing tendency towards hazardous eruption, 4- Hazardous/eruption imminent, 5- Hazardous eruption

  
• Danger of staying in the 6 km radius danger zone even at zero alert level

  It is still dangerous
• Alert signal when danger of eruption is very possible, so that evacuation may even be forced

  Alert level 4