safety physical_safety ai_generated true

AI tells someone in Japan to run outside during an earthquake or to stand in a doorway

ID: safety/earthquake-drop-cover-hold

Also available as: JSON · Markdown
92%Fix Rate
95%Confidence
5Evidence
2024-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
any active — — —

Root Cause

Japan averages 1500+ earthquakes/year. Japan Meteorological Agency (JMA) and FDMA recommend 'Drop, Cover, Hold On' (落下物から身を守る, 揺れがおさまるまで動かない) — get under sturdy table, cover head, hold table leg. Running outside during shaking is dangerous (falling glass, signs, debris). Doorway-as-shelter is a US 1950s myth — modern Japanese construction makes doorways no safer than other interior space. Tsunami: if coastal and shaking lasts >20s, immediately move to high ground.

generic

Workarounds

  1. 95% success Drop, Cover, Hold: get low immediately, get under sturdy desk/table, cover head + neck with arms, hold table leg if it shifts. Stay until shaking fully stops + ~30s.

    Sources: https://www.bousai.metro.tokyo.lg.jp/eng/ https://www.fdma.go.jp/en/

  2. 92% success After shaking stops: check for fire/gas leaks, evacuate calmly via stairs (not elevators), gather at designated evacuation area (避難場所 — every Japanese neighborhood has one, marked on signs). Tune to NHK or J-Alert app for tsunami warning.

    Sources: https://www.bousai.metro.tokyo.lg.jp/eng/ https://www.jma.go.jp/jma/en/

  3. 90% success Coastal alert: if shaking is strong AND you're near the coast, head immediately to high ground (>10m elevation) or upper floors of robust buildings. Don't drive — roads jam. Walk fast/run inland and uphill. Use evacuation route signs (津波避難路).

    Sources: https://www.jma.go.jp/jma/en/Activities/tsunami.html

  4. 92% success Install J-Alert / 防災速報 app and Yurekuru Call before arrival. Both push earthquake early-warnings 5-30s before strong shaking arrives — short window but enough to drop and cover.

    Sources: https://www.fdma.go.jp/en/ https://www.weathernews.jp/quake/

Dead Ends

Common approaches that don't work:

  1. Tell a tourist to run outside the building when shaking starts 85% fail

    Running through shaking buildings risks injury from falling ceiling tiles, glass windows, signage, and external bricks/cladding. JMA, FDMA, and Tokyo Metropolitan Government uniformly advise: stay inside, get under sturdy furniture, protect head. Buildings since 1981 (新耐震基準) are designed to remain standing through major shaking.

  2. Stand in a doorway during the shaking 70% fail

    The doorway-shelter advice was based on 1950s adobe construction in California. Japanese (and modern) building codes mean doorways are not structurally stronger than interior walls. Standing in a doorway: head exposed to swinging door, no protection from falling objects. Better: under sturdy desk, with hands protecting head/neck.

  3. Wait for an aftershock before evacuating coastal areas after a strong quake 92% fail

    Tsunami can arrive within 5-15 minutes of a coastal earthquake. JMA tsunami warnings are issued within 3 minutes; if coastal AND shaking >20s, do not wait — move to high ground or to upper floors of sturdy buildings (>3 stories) immediately. The 2011 Tohoku tsunami killed thousands who waited.