Key facts
- A 7.2-magnitude earthquake struck northeastern Japan off the coast of Iwate prefecture.
- Four people were injured.
- No tsunami warning was issued.
- Major energy facilities, including nuclear power plants and refineries, reported no damage or operational impacts.
- The earthquake registered an upper-6 seismic intensity in Aomori prefecture.
A 7.2-magnitude earthquake struck northeastern Japan off the coast of Iwate prefecture, causing significant shaking but no widespread damage to energy infrastructure. The Japan Meteorological Agency reported the quake occurred at 07:30 on June 25 Japan time, registering an upper-6 seismic intensity in Aomori prefecture. Crucially, no tsunami warning was issued, and Prime Minister Sanae Takaichi confirmed the absence of tsunami risk.
Industry sources indicated that nuclear power plants, thermal power facilities, and domestic refineries remained unaffected. Tohoku Electric Power confirmed that power generation facilities in the Tohoku area, including nuclear, thermal, hydroelectric, and renewable plants, sustained no damage. Similarly, Hokkaido Electric Power reported no damage to its facilities. Japanese refiner Eneos also stated that its Sendai refinery and other facilities were not impacted by the earthquake.
The Onagawa No.2 nuclear reactor in Miyagi and the Rokkasho nuclear fuel reprocessing plant in Aomori reported no damage. Biomass power plants in Iwate and Aomori were also unaffected. The earthquake registered a lower seismic intensity in other areas, and no nuclear reactors are currently operating in Hokkaido.