A strong earthquake measuring 7.5 magnitude struck off the northeastern coast of Japan on Monday, prompting tsunami warnings and advisories across multiple coastal regions, according to the Japan Meteorological Agency.
The quake occurred offshore near the eastern side of Honshu, triggering immediate alerts for potentially dangerous tsunami waves. Authorities issued a three-meter tsunami warning for parts of Iwate Prefecture, as well as coastal areas of Aomori Prefecture and Hokkaido.
In nearby regions, officials issued tsunami advisories, warning that waves of up to one meter could still impact coastal zones. Residents in affected areas were urged to move to higher ground and stay away from shorelines as emergency monitoring systems tracked wave activity.
The US Tsunami Warning System reported a slightly lower magnitude of 7.4 for the same seismic event, confirming the earthquake struck offshore near Japan’s Pacific coast. The tsunami alert was issued shortly after the quake was detected at approximately 8:52 UTC (4:52 a.m. ET).
Japan, located along the Pacific “Ring of Fire,” is one of the most earthquake-prone countries in the world, frequently experiencing powerful seismic activity due to tectonic plate movement beneath the ocean floor. Authorities have built extensive early warning systems designed to detect earthquakes within seconds and issue rapid tsunami alerts to coastal populations.
Emergency services across northeastern Japan have been placed on alert, with local governments coordinating evacuation measures and monitoring coastal water levels for sudden changes.
So far, no immediate reports of large-scale damage or casualties have been confirmed, but officials warn that tsunami waves may continue to develop in the hours following the quake.
Authorities continue to urge residents in affected regions to remain cautious, avoid returning to coastal areas, and follow official evacuation instructions until the all-clear is issued.
