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Japan Meteorological Agency Issues Post-Earthquake Warning for Hokkaido-Sanriku Coasts
Following a major earthquake off the Sanriku coast on April 20, the Japan Meteorological Agency issued a 'Hokkaido-Sanriku Post-Earthquake Warning,' urging residents to prepare.
Post-Earthquake Warning Issued
The Japan Meteorological Agency announced a 'Hokkaido-Sanriku Post-Earthquake Warning Information' after a major earthquake occurred off the Sanriku coast on the evening of April 20. This warning indicates that there is a higher-than-usual possibility of a giant earthquake along the Chishima Trench and Japan Trench.
Targeted Areas and Preparedness Call
The warning applies to 182 municipalities stretching from Hokkaido to Chiba Prefecture. The JMA urged residents in these areas to reconfirm their daily preparations for earthquakes.
*Source: NHK World-Japan (2026-04-21)*
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