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This article was automatically translated from the original Turkish version.
Tōhoku Earthquake, a magnitude 7.5 earthquake that occurred on 20 April 2026 off the coast of the Tōhoku region in northeastern Japan. Following the earthquake, tsunami warnings were issued for the northern coastal areas of the country, and evacuation measures were implemented in coastal settlements.
The earthquake occurred in the Pacific Ocean, approximately 100 kilometers offshore and at a depth of 10 kilometers. The shaking was recorded at level “upper 5” on Japan’s national seismic intensity scale, defined as a level where people have difficulty maintaining balance and weak structures may sustain damage. The earthquake was also felt in Tokyo and its surroundings.
Following the earthquake, the Japan Meteorological Agency issued warnings for potential tsunami waves reaching up to 3 meters in Iwate and Aomori prefectures and in Hokkaido.
Within the first hour after the earthquake, tsunami waves were observed at various ports. Approximately 80 centimeters of wave height was recorded at Kuji Port in Iwate Prefecture, 40 centimeters at Miyako Port, 30 centimeters at Hachinohe Port in Aomori, and 20 centimeters in the Erimo region of Hokkaido. Authorities warned that higher waves could still occur.
Residents of Iwate, Aomori, Miyagi, Fukushima, and Akita prefectures, as well as certain areas of Hokkaido, were urged to evacuate. Mass evacuations were ordered in coastal settlements such as Otsuchi and Kamaishi. Ships in ports were directed to move out to open sea.
Japanese Prime Minister Sanae Takaichi announced the establishment of an emergency response task force after the earthquake and called on residents in affected areas to move to higher ground.
Rail transport in northern regions was disrupted due to the earthquake. Services on the Tōhoku and Akita Shinkansen lines were halted, and high-speed train services in Aomori were temporarily suspended. Preventive measures were implemented at ports and along coastal infrastructure.
No active nuclear power plants were reported to be located in the affected areas. Statements by Tokyo Electric Power Company and other energy providers indicated no abnormalities were detected in shutdown facilities. No unusual conditions were reported at the nuclear facilities in Fukushima.
The Japan Meteorological Agency warned that strong aftershocks could occur over the following days and weeks, particularly noting that stronger aftershocks might be expected within the first two to three days.
On April 20 2026 an earthquake of magnitude 7.5 occurred off the coast of Tōhoku in Japan. Following the earthquake tsunami warnings up to 3 meters were issued for the coasts of Iwate Aomori and Hokkaido. In the initial hours waves reaching 80 centimeters were recorded at some ports and evacuation orders were issued for coastal areas. Transportation disruptions occurred but no anomalies were reported at nuclear facilities.
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