M 4.9 earthquake in Japan (Nagano) — April 18, 2026

M 4.9 earthquake in Japan (Nagano) — April 18, 2026. Epicenter 30 km W of Nagano, depth 10 km, 14:54 Local (2026-04-18 05:54 UTC). Shaking felt by ~3.5M people. Readings from every reporting agency, affected towns, aftershock sequence.

30 km W of Nagano (Japan) — 36.6044, 137.8378