Overview
- The Japan Meteorological Agency estimated the earthquake at magnitude 5.7 with a depth of roughly 30 kilometers.
- Maximum shaking reached shindo 4 in Morioka, with shindo 3 recorded in multiple municipalities across Iwate, Aomori and Miyagi.
- The agency reported no tsunami concern following the late-night tremor.
- Lower intensities were observed across parts of Hokkaido, Akita, Yamagata, Fukushima and Niigata.
- Reports placed the origin time at about 11:26 to 11:27 p.m. JST on Dec. 31, and local outlets published municipality-level intensity lists.