A 7.7 magnitude earthquake struck off northern Japan on April 20, 2026, at around 4:53 p.m. The quake occurred at a depth of about 19 kilometers. It triggered a tsunami alert, with waves reaching approximately 80 centimeters at Kuji port.
Injuries were reported in Aomori and Iwate, where two people sustained harm due to the quake. The U.S. Geological Survey measured the quake’s strength at 7.4 magnitude, slightly lower than Japan’s assessment.
Authorities issued warnings for potential tsunami waves of up to three meters. Japan’s Meteorological Agency advised residents to remain on safe ground until the warning is lifted. Officials urged those in coastal and riverside areas to evacuate immediately to higher ground.
The earthquake serves as a stark reminder of the devastating March 2011 disaster that resulted in over 22,000 deaths across northern Japan. It highlights the region’s vulnerability along the seismically active Pacific Ring of Fire.
The Shinkansen bullet trains connecting Tokyo and northern Japan were temporarily suspended following the quake. This disruption affected thousands of travelers in the area.
Prime Minister Sanae Takaichi stated, “The government will do our utmost in case of an emergency.” She emphasized preparedness and swift action in response to natural disasters.
After the initial quake, there remains a 1% chance for a megaquake occurring within the next week. Authorities continue monitoring seismic activity closely.
The Nuclear Regulation Authority reported no abnormalities at nuclear power plants in the region, providing some reassurance amid ongoing concerns about safety standards.
Details remain unconfirmed regarding further developments or aftershocks. Residents are advised to stay alert as officials assess the situation.
