M4.6 earthquake strikes 20 km ESE of Tsunō, Japan; no immediate damage reports

A magnitude 4.6 earthquake occurred at 01:07 UTC on 2026-09-18, 20 km ESE of Tsunō, Japan, at a depth of 53.95 km. The moderate depth and magnitude suggest limited surface impact, but no damage or casualty reports are yet available. This is a routine seismic event in a seismically active region, with no indication of escalation.