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Japan Meteorological Agency (JMA)

Japan Meteorological Agency (JMA)

National Meteorological and Seismological Service

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Japan’s Sanriku Quake Triggers First-Ever ‘Megaquake’ Warning

Japan’s Sanriku Quake Triggers First-Ever ‘Megaquake’ Warning

Issued tsunami alerts and the first megaquake ‘subsequent earthquake’ advisory after the Sanriku quake

New Capabilities ongoing
Japan’s 2025 Sanriku Earthquake Tests a New Era of Tsunami and ‘Megaquake’ Preparedness

Japan’s 2025 Sanriku Earthquake Tests a New Era of Tsunami and ‘Megaquake’ Preparedness

Primary issuer of earthquake, tsunami, and subsequent earthquake advisories

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