Update: Aug. 26 – 5.6 magnitude earthquake reported close to Onagawa Chō, Japan

Published Aug 26, 2026

OSHIKA DISTRICT, Miyagi — A 5.6 magnitude quake struck near Onagawa Chō on Wednesday morning, according to the U.S. Geological Survey.

A tremor jolted the area at 19:21 UTC (05:21 local time). The earthquake’s epicenter was about 212 km east of Onagawa Chō and occurred at a depth of 10 km.

Did you feel it?

If you felt the quake, you can report it through the USGS Felt Report form.

Impact and estimated losses

The USGS categorized this as a Green Alert, which means 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