Magnitude 4.4 Earthquake Strikes Off Miyagi Coast, No Tsunami Threat

Earthquake Details Confirmed Off Miyagi Coast

A moderate earthquake with a magnitude of 4.4 struck off the coast of Miyagi Prefecture, Japan, on Tuesday, December 16, 2025. The tremor occurred at approximately 11:45 a.m. Japan Standard Time (JST), corresponding to 02:45 UTC. The Japan Meteorological Agency (JMA) swiftly confirmed that there was no tsunami expected as a result of the seismic activity.

Epicenter and Depth

The earthquake's epicenter was located in the North Pacific Ocean, approximately 19 kilometers southeast of Kesennuma, Miyagi. The quake registered at a moderate depth of 103 kilometers (64 miles). Earthquakes at such depths are often felt over a wider area but typically cause less intense shaking on the surface compared to shallower quakes of similar magnitude.

Seismic Intensity Reported Across Region

While no tsunami threat was issued, the earthquake's shaking was felt in several prefectures. The highest seismic intensity recorded was a 3 on the Japanese Shindo scale of 7, observed in the Miyagi Prefecture cities of Tome, Wakuya, and Ishinomaki. Additionally, a seismic intensity of 2 was reported in broader areas of Miyagi, Iwate, and Aomori Prefectures. The JMA is the official body responsible for monitoring and reporting on seismic events in Japan.

Japan's Seismic Context

Japan is situated in one of the world's most seismically active zones, experiencing frequent earthquakes due to its location on the Pacific 'Ring of Fire.' The region off Miyagi Prefecture, in particular, is known for its high level of seismic activity. Despite the common occurrence of tremors, the robust building codes and advanced early warning systems in Japan are designed to mitigate potential damage and ensure public safety. No immediate reports of damage or injuries were associated with this specific event.