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Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first. Full disclaimer

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Japan alert decoder · 緊急地震速報（予報）

Earthquake Early Warning (forecast)

Stay alert and check updates · official rules as of 2026-10-17

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緊急地震速報（予報）

Earthquake Early Warning (forecast)

A lower-level early estimate (issued for about M3.5+ or predicted intensity 3+). Phones in Japan sound the area-wide alarm only for the warning version; a forecast in an app means weaker shaking is likely.

What to do now

  1. Be ready to protect yourself if shaking starts.
  2. Stay away from things that can fall.

Issued by: JMA (used by some apps and devices; not the phone-wide emergency alert). Live status: JMA warnings map (English)JMA earthquake information (English)JMA tsunami information (English)

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Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first.

Data as of 2026-10-17 from official JMA, Cabinet Office, Cabinet Secretariat (J-ALERT) and Ministry of the Environment pages, with official names from the JMA multilingual dictionary (2026-03-26). Not affiliated with JMA or any government agency.

Educational guide, not an alert service: no live data. Always follow official instructions from JMA, your municipality, police, fire and staff. In an emergency, protect yourself first. Data as of 2026-10-17 from official JMA, Cabinet Office, Cabinet Secretariat (J-ALERT) and Ministry of the Environment pages, with official names from the JMA multilingual dictionary (2026-03-26). Not affiliated with JMA or any government agency.