M 4.8 earthquake: North Pacific Ocean (Japan) — December 21, 2025

M 4.8 earthquake: North Pacific Ocean (Japan) — December 21, 2025. Epicenter 283 km E of Kushiro, depth 35 km, 12:33 Local (2025-12-21 03:33 UTC). Readings from every reporting agency, affected towns, aftershock sequence.

North Pacific Ocean (283 km E, Japan) — 43.5394, 147.7812