disaster life_threatening ai_generated partial

AI advises sheltering in a basement during a volcanic eruption to avoid ash and pyroclastic flow

ID: disaster/volcano-shelter-in-basement-myth

Also available as: JSON · Markdown · 中文
72%Fix Rate
88%Confidence
1Evidence
2024-03-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
USGS Volcano Hazards Program 2024 active — — —
IAVCEI Guidelines v2.1 active — — —

Root Cause

Sheltering in a basement during a volcanic eruption is deadly because pyroclastic flows can fill low-lying areas with superheated gas and ash, causing asphyxiation and burns, and basements can collapse under ash weight.

generic

中文

火山喷发时躲进地下室是致命的，因为火山碎屑流会填充低洼区域，带来过热气体和火山灰，导致窒息和烧伤，并且地下室可能因火山灰重量而坍塌。

Official Documentation

https://www.usgs.gov/programs/VHP/volcano-safety-tips

Workarounds

  1. 85% success Evacuate to higher ground outside the volcanic hazard zone; if trapped, shelter in an upper-floor interior room away from windows and vents. 
    Evacuate to higher ground outside the volcanic hazard zone; if trapped, shelter in an upper-floor interior room away from windows and vents.
  2. 70% success Use a respirator or N95 mask and stay in a sealed room on an upper floor, covering all cracks with plastic sheeting. 
    Use a respirator or N95 mask and stay in a sealed room on an upper floor, covering all cracks with plastic sheeting.

中文步骤

  1. Evacuate to higher ground outside the volcanic hazard zone; if trapped, shelter in an upper-floor interior room away from windows and vents.
  2. Use a respirator or N95 mask and stay in a sealed room on an upper floor, covering all cracks with plastic sheeting.

Dead Ends

Common approaches that don't work:

  1. Advising users to seal basement vents with wet towels to block ash 95% fail

    Wet towels cannot block superheated pyroclastic gas; they may ignite or trap toxic fumes inside.

  2. Recommending basement shelter with a battery-powered fan to circulate air 88% fail

    Fans circulate deadly ash and gas, accelerating asphyxiation; also power may fail.

  3. Telling users to wait in basement until eruption ends, then exit 92% fail

    Ash weight can collapse basement roof within hours, and gas pockets remain lethal long after eruption.