Stories
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
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ongoing
Japan’s 2025 Sanriku Earthquake Tests a New Era of Tsunami and ‘Megaquake’ Preparedness
Primary issuer of earthquake, tsunami, and subsequent earthquake advisories
Built World
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ongoing