The Japan Meteorological Agency downgraded the tsunami warning after the 7.7 magnitude earthquake, indicating that the initial threat has been mitigated.

PBS: An earthquake registering a preliminary magnitude of 7.7 off northern Japan on Monday prompted a short-lived tsunami alert and the advisory of a higher risk of a possible mega-quake for coastal areas there. https://www.pbs.org/newshour/world/after-a-7-7-magnitude-quake-japan-warns-of-slightly-higher-risk-of-a-possible-mega-quake

Japan warns of slightly increased risk of mega-quake after 7.7-magnitude one An earthquake with a preliminary magnitude of 7.7 off the coast of northern Japan triggered a short-lived tsunami… #NewsBeep #News #Headlines #chishima #earthquake #hokkaido #jakarta #japan #jma #TopNews #TopStories #tsunami #tsunamialert #tsunamiwarning #tsunamiwatch https://www.newsbeep.com/au/619929/

Japan downgrades tsunami warning after major quake cphpost.dk/2026-04-20/global/japan-downgrades-tsunami-warning-after-major-quake A 7.7 magnitude earthquake struck off Japan’s coast near Iwate prefecture on Monday. The Japan Meteorological Agency initially issued a tsunami warning for waves up to three meters on Honshu and Hokkaido, prompting immediate evacuations to higher ground.…

Japan downgrades tsunami warning after major quake cphpost.dk/2026-04-20/global/japan-downgrades-tsunami-warning-after-major-quake A 7.7 magnitude earthquake struck off Japan’s coast near Iwate prefecture on Monday. The Japan Meteorological Agency initially issued a tsunami warning for waves up to three meters on Honshu and Hokkaido, prompting immediate evacuations to higher ground.…

Japan warns of slightly increased risk of mega-quake after a 7.7-magnitude one phys.org/news/2026-04-japan-slightly-mega-quake-magnitude.html An earthquake registering a preliminary magnitude of 7.7 off northern Japan on Monday prompted a short-lived tsunami alert and the advisory of a higher risk of a possible mega-quake for coastal areas there.