Seismic Activity Across Japan in December 2025 (Magnitude 4.0 or over)

On December 8, at 23:15, an M7.5 quake (maximum seismic intensity 6 Upper) occurred offshore east of Aomori Prefecture.
On December 9, at 03:56, an M6.1 quake (maximum seismic intensity 3) occurred offshore east of Aomori Prefecture.
On December 9, at 06:52, an M6.6 quake (maximum seismic intensity 4) occurred offshore east of Aomori Prefecture.
On December 10, at 23:52, an M6.0 quake (maximum seismic intensity 4) occurred offshore east of Aomori Prefecture.
On December 12, at 11:44, an M6.9 quake (maximum seismic intensity 4) occurred offshore east of Aomori Prefecture.
On December 28, at 00:05, an M7.0 quake (maximum seismic intensity 3 observed in Japan) occurred near Taiwan.
On December 31, at 23:26, an M6.1 quake (maximum seismic intensity 4) occurred offshore of Iwate Prefecture.

(Outside the above period)

On January 6, at 10:18, an M6.4 quake (maximum seismic intensity 5 Upper) occurred in eastern Shimane Prefecture.
On January 6, at 10:28, an M5.1 quake (maximum seismic intensity 5 Lower) occurred in eastern Shimane Prefecture.

[The events which have date, time and magnitude in the figure are M5.0 or greater earthquakes, or M4.0 or greater earthquakes that have a maximum seismic intensity of 5 Lower, or greater. The above mentioned event(s) fall under one or more of the following categories; M6.0 or greater earthquakes, or M4.0 or greater earthquakes that have maximum seismic intensity of 5 Lower, or greater.]

N: total number of events in the figure

Japan Meteorological Agency
Ministry of Education, Culture, Sports, Science and Technology
(Japan Meteorological Agency data include data from the National Research Institute for Earth Science and Disaster Resilience and related universities.)
[Evaluation of Seismic Activities for December 2025 (January 14, 2025)]