Updated

A magnitude 5.5 earthquake struck Japan at 15:07 UTC on 28 October 2026, at a depth of about 41 km, according to a GDACS green alert. The alert estimated that 100 thousand people were exposed to MMI V shaking. No damage, injuries or deaths are reported in the alert. Green alerts are the lowest tier of GDACS's system, and the excerpts give no further details on the location or effects of the shaking.