Overview
- The quake struck around 11:15 p.m. off Aomori at a depth of about 50–54 km with magnitude 7.5, producing upper-6 shaking and tremors felt in parts of Tokyo.
- The Japan Meteorological Agency warns of the possibility of a similar or larger event in the coming days and is maintaining an alert for the Hokkaido–Sanriku offshore region through December 16.
- Prime Minister Sanae Takaichi said about 30 people have been reported injured, with no widespread structural damage reported so far.
- JR East suspended Tohoku Shinkansen services between Morioka and Shin-Aomori for inspections, causing delays that affected some trains toward Tokyo.
- Tsunami waves up to 70 cm were recorded, utilities and carriers reported no major outages, and nearby nuclear facilities reported no significant issues as Hokkaido Electric halted two interconnections while its Kitahon link remained online.