Tsunami Warning in Japan: 7.5-Magnitude Earthquake Hits Northern Coast, 10-Foot Waves Expected
Tokyo, April 20, 2026 — A powerful earthquake with a preliminary magnitude of 7.5 struck off the northern coast of Japan on Monday afternoon, prompting the Japan Meteorological Agency (JMA) to issue an immediate tsunami alert for the region.
The significant seismic event occurred near the coast of Sanriku in northern Japan at approximately 4:53 p.m. local time (0753 GMT). According to the meteorological agency, the earthquake struck at a shallow depth of about 10 kilometers (6 miles) below the sea surface, a factor that often contributes to the generation of dangerous tsunami waves.
Tsunami Warning Issued
Following the tremor, Japan’s NHK public television rapidly broadcast warnings, alerting coastal residents that a tsunami with waves reaching up to 3 meters (10 feet) could hit the area shortly. Authorities are urging immediate evacuation to higher ground for those in the affected coastal zones.
Emergency services are on high alert, and continuous assessments are being made regarding potential damage to infrastructure and the risk to coastal communities. Currently, there are no immediate reports of major casualties or widespread structural collapse, though the situation remains developing.
Echoes of 2011
The powerful earthquake has inevitably sparked anxiety in a region that bears deep scars from previous disasters. It has been 15 years since the devastating magnitude 9.0 earthquake and subsequent tsunami on March 11, 2011, ravaged parts of northern Japan. That historic catastrophe caused more than 22,000 deaths, triggered the Fukushima Daiichi nuclear power plant meltdown, and forced nearly half a million people to flee their homes.
While today’s 7.5-magnitude quake is significantly less powerful than the 2011 event, the shallow depth and immediate tsunami warnings have prompted a swift and serious response from the Japanese government and local authorities.
This is a developing story. Further details regarding potential damage and the tsunami’s impact are awaited.
