The Japan Meteorological Agency recorded a Magnitude 7.6 Earthquake at a depth of about 50 km, about 80 km off the east coast of Aomori Prefecture, which lies on the northern tip of Honshū Island, at about 11.15 pm Japan Standard Time (about 2.15 pm GMT) on Monday 8 December 2025. Thirty four people were injured as a result of the event, with some damage to buildings and roads. A tsunami warning was issued in the immediate aftermath of the event, causing about 90 000 people to evacuate from low lying areas, but in the event, no major tsunami occurred. Power supplies were also disrupted, leaving 2700 homes without power, and rail services were temporarily suspended. A number of aftershocks have followed the initial event.
Japan has a complex tectonic situation, with parts of the country on four different tectonic plates. Aomori Prefecture lies on the convergent margin where the Okhotsk Plate is pushed against the Eurasian Plate, with the Pacific Plate being subducted beneath the Okhotsk Plate to the east. This is not a smooth process; the rocks of the two plates constantly stick together, only to break apart again as the pressure builds up, causing Earthquakes in the process.
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