Earthquake off Aomori Coast – Information Update and PBV’s Initial Response
A magnitude 7.5 earthquake struck off the coast of Aomori Prefecture at 11:15 p.m. on December 8, with a maximum seismic intensity of upper 6 recorded in Hachinohe. Tsunami warnings were issued for coastal areas of Hokkaido, Aomori, and Iwate, and small tsunamis of 40–70 cm were observed. All tsunami advisories were lifted by 6:20 a.m. on December 9.
Damage such as road collapse and power outages has been reported, and several people were injured by falls or falling objects.
Risk of Strong Aftershocks and “Megaquake” Advisory
The Japan Meteorological Agency and the Cabinet Office warn that strong aftershocks—or a potential larger main shock—may occur over the next week.
Officials note that, based on global earthquake statistics, there is a possibility of a magnitude 8 or greater earthquake occurring along the Japan Trench or Chishima Trench as a follow-up event.
It remains unclear whether such an earthquake will happen, but residents are urged to stay alert.
This is the first issuance of this type of alert since the category was introduced in 2022.
Safety Recommendations for Residents and Travelers
People in Hokkaido, Tohoku, and Pacific coastal areas from Hokkaido to Chiba are advised to:
- Stay away from coastal areas
- Check evacuation routes and nearby shelters
- Prepare emergency supplies (water, food, portable toilet, lights, chargers)
- Secure furniture and household items to prevent injuries
- Follow updates from local governments, JMA, and official emergency channels
Transportation disruptions continue in some areas.
The Tohoku Shinkansen has been temporarily suspended between Morioka and Shin-Aomori while safety inspections are conducted. Flights are operating as usual.
No abnormalities have been reported at nuclear facilities in Fukushima, Aomori, Miyagi, or Hokkaido.
PBV’s Response
PBV has begun initial information-gathering and is coordinating with partner organizations to assess needs and determine possible support.
We will continue monitoring official information and share updates as they become available.
For real-time information, please follow local authorities and the Japan Meteorological Agency.