A moderate, magnitude 5.9 earthquake shakes eastern Japan. No tsunami alert is issued

by | Aug 22, 2026 | Top Stories

A moderate, magnitude 5.9 earthquake shakes eastern Japan. No tsunami alert is issued

An earthquake with preliminary magnitude 5.9 struck eastern Japan in the early hours of Sunday, centered in the southern Ibaraki prefecture at a depth of 70 kilometers. The U.S. Geological Survey recorded a slightly lower preliminary magnitude of 5.8 for the same event. Japan’s meteorological agency determined that no tsunami posed a threat to coastal areas following the tremor.

The earthquake was felt across the Tokyo metropolitan area and triggered emergency alerts on mobile phones throughout the region. Despite the widespread reach of the seismic activity, traffic conditions in nearby cities such as Mito and Saitama appeared to remain normal according to footage from NHK public television. No immediate reports of injuries emerged in the hours following the earthquake.

Minor infrastructure damage was documented in isolated cases. An underground water pipe ruptured in Tokyo’s Koto ward, with water spilling onto the street, while approximately 460 residential properties in Tokyo experienced temporary power outages managed by TEPCO Power Grid. The government established a task force to conduct a thorough assessment of potential damage, as announced by Prime Minister Sanae Takaichi on social media.

Nuclear facilities across the affected region reported no issues stemming from the earthquake. The Nuclear Regulation Authority confirmed that approximately a dozen nuclear power plants and other installations handling nuclear materials operated normally with no anomalies detected. The moderate earthquake comes roughly one month after a significantly more powerful magnitude 7.1 earthquake struck the Kumamoto area on Kyushu island, which resulted in 38 fatalities, 364 injuries, and substantial destruction affecting more than 1,500 buildings.

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