Mapped: M7.4 Earthquake Off Japan’s Sanriku Coast — Tsunami Warning for Iwate, Aomori, and Hokkaido
An M7.4 earthquake struck 100 km east-northeast of Miyako, Iwate at 16:53 JST on April 20, 2026. Japan’s Meteorological Agency issued a tsunami warning for waves up to 3 m along the Iwate, Aomori, and Hokkaido coasts. Interactive map of the epicenter, shaking intensity by city, and tsunami warning zones — plus the Sanriku-coast quake history.



















