EarthquakeIwateJapanSanrikuSanrikuSubsequent Quake AdvisoryTsunami M7.7 Earthquake – Iwate Prefecture Sanriku Coast (Subsequent Quake Advisory Issued) UPDATE: The magnitude was increased to M7.7 from 7.5. Since this quake exceeded the M7.0 for this area... MurasamaApr 20, 2026Apr 20, 2026