Update: 5.5 magnitude earthquake strikes close to Onagawa Chō, Japan on Aug. 29

Published Sep 25, 2025

OSHIKA DISTRICT, Miyagi — Friday morning, a 5.5 magnitude quake was registered close to Onagawa Chō, according to the U.S. Geological Survey.

The tremor hit the area at 16:29 UTC (01:29 local time). It occurred at a depth of 50 km with the epicenter situated approximately 55 km east of Onagawa Chō.

Did you feel it?

Those who felt the earthquake are encouraged to report it through the USGS Felt Report form. So far, the agency has collected 25 online responses from individuals reporting that they felt the quake. The USGS DYFI report indicates that light shaking was recorded, with people in Kawasaki, Kawaguchi, Sendai, Tomiya and Tagajō among those who felt the tremor.

DYFI Image

Impact and estimated losses

Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage. Recent earthquakes in this area have caused secondary hazards such as landslides and fires that might have contributed to losses.

Structure information summary
Overall, the population in this region resides in structures that are resistant to earthquake shaking, though vulnerable structures exist. The predominant vulnerable building types are heavy wood frame and reinforced/confined masonry construction.

Source: The U.S. Geological Survey