According to the Japan Meteorological Agency, at 23:33 local time on December 8, an earthquake of magnitude 5.6 occurred off the eastern coast of Aomori Prefecture, with a maximum intensity of magnitude 3. According to information from Japan's Tohoku Electric Power Company, it is being confirmed whether there is an abnormality at the Onagawa nuclear power plant. Furthermore, according to information from Japan's Hokkaido Electric Power Company, it is being confirmed whether an anomaly has occurred at the Tomari Nuclear Power Plant.

According to the Japan Meteorological Agency, at 23:33 local time on December 8, an earthquake of magnitude 5.6 occurred off the eastern coast of Aomori Prefecture, with a maximum intensity of magnitude 3. According to information from Japan's Tohoku Electric Power Company, it is being confirmed whether there is an abnormality at the Onagawa nuclear power plant. Furthermore, according to information from Japan's Hokkaido Electric Power Company, it is being confirmed whether an anomaly has occurred at the Tomari Nuclear Power Plant.