Major 7.5-Magnitude Earthquake Hits North-Eastern Japan; Tsunami Warnings Issued
TOKYO | April 20, 2026
A powerful 7.5-magnitude earthquake struck off the coast of north-eastern Japan on Monday evening, triggering urgent tsunami warnings and mass evacuation orders across several prefectures.
The Japan Meteorological Agency (JMA) confirmed the quake hit at 4:52 PM local time at a shallow depth of 10km (6.2 miles), with the epicenter located approximately 100km off the coast of Sanriku.
Tsunami Observations and Warnings
The first tsunami waves have already begun reaching the eastern coast. A 40cm wave was recorded at Miyako port in Iwate prefecture shortly after the tremor. However, authorities have warned that subsequent waves could be much larger, with forecasts predicting surges of up to 3 meters (10 feet) for the Pacific coasts of Iwate, Aomori, and Hokkaido.
Tsunami advisories are also in place for Miyagi and Fukushima prefectures. Public broadcaster NHK has been broadcasting urgent "Tsunami!
Government Response and Safety Measures
Prime Minister Sanae Takaichi has established an emergency crisis management task force at the Prime Minister's Office. In a televised address, she urged residents in the impacted zones to abandon coastal areas immediately. "Please do not hesitate. Seek higher ground now to protect your lives," Takaichi stated.
Key Impacts Recorded So Far:
Infrastructure: Bullet train services (Shinkansen) in Aomori have been suspended for safety checks.
Nuclear Plants: Operators report no immediate abnormalities at the Fukushima Daiichi, Daini, or Onagawa nuclear power plants, though detailed inspections are ongoing.
Seismic Intensity: The quake registered a 5+ on Japan’s 7-point seismic scale, a level strong enough to cause structural damage and make it difficult for people to remain standing.
A Region on High Alert
The tremors were felt as far away as Tokyo, hundreds of miles from the epicenter. The JMA has warned residents to stay vigilant for potential landslides and significant aftershocks throughout the week.
This event carries a heavy emotional weight for the region, occurring 15 years after the devastating 2011 Great East Japan Earthquake and Tsunami.
Emergency officials emphasize that the first wave is often not the largest and have instructed citizens to remain in safe, elevated locations until all warnings are officially retracted.
