Overview

• USGS and EMSC measured the earthquake at M6.0 at 15:21 UTC on October 4, 2025, locating it offshore east of Honshu.
• The hypocenter was about 46.8–47 km deep, with the epicenter tens of kilometers east of towns including Tomioka and Namie.
• USGS modeling shows no tsunami threat from this event.
• Exposure estimates indicate roughly 4.37 million people felt light shaking and about 28.79 million felt weak shaking, with no areas reaching moderate intensity.
• Authorities reported no significant damage or injuries as of the latest assessments, and agencies’ readings were consistent.