Overview
- The 11:15 p.m. JST earthquake struck off eastern Aomori at about 50 km depth, registering a maximum intensity of shindo 6+ in Hachinohe.
- Tsunami warnings were issued for the Pacific coasts of Hokkaido, Aomori and Iwate, with observed waves including 50 cm at Kuji and 40 cm at Urakawa and Rokkasho.
- JR East suspended Tohoku Shinkansen operations between Fukushima and Shin-Aomori in both directions, with no immediate timeline for resumption.
- The prime minister ordered life‑saving measures and the cabinet set up a response office as coastal municipalities issued evacuation orders and opened shelters.
- Regulators and utilities reported no abnormalities at the Higashidori, Onagawa and Tomari nuclear plants, with checks continuing at other facilities including Rokkasho.