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1h ago

Japan Issues Rare Megaquake Advisory After 7.5 Offshore Quake

Officials put the one-week chance of an M8+ event at about 1% and urge coastal residents to prepare even as nuclear checks report no abnormalities.

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A vehicle rests on the edge of a collapsed road in Tohoku town in Aomori Prefecture on Dec. 9, 2025, following a 7.5 magnitude earthquake off northern Japan. The quake on Dec. 8 left at least 30 injured, authorities said, damaging roads and leaving thousands without power in freezing temperatures.
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Overview

  • Authorities lifted tsunami alerts after observed waves up to 70 cm, with evacuations affecting roughly 90,000 people in northern coastal areas.
  • Injuries stand at least at 34 nationwide, with regional tallies reporting up to 39, and damage remains limited to scattered road and building issues.
  • The quake struck around 80 km off Aomori at a depth of about 54 km late Monday, and aftershocks continued into Tuesday.
  • The advisory covers 182 municipalities from Hokkaido to Chiba along the Japan and Chishima/Kuril trenches, where officials warn a larger quake could generate coastal tsunamis.
  • The government activated an emergency task force; rail services were temporarily disrupted, power outages were restored, and Tohoku Electric reported no issues at Higashidori or Onagawa nuclear plants.