Overview
- USGS measured the offshore quake near Misawa at 14:15 GMT at a depth of about 53 kilometers, with tremors felt widely across the archipelago.
- JMA issued a tsunami alert warning of waves up to three meters, and multiple waves as high as 70 centimeters were later recorded in Aomori and Hokkaido.
- Prime Minister Sanae Takaichi activated a crisis-management cell and warned that subsequent, possibly larger, tsunami waves could follow.
- At least 30 people were injured, including one seriously in Hokkaido, and authorities recommended evacuations for roughly 28,000 residents.
- Power outages affected about 2,700 households in Aomori, numerous fires were reported, some Shinkansen services were suspended for checks, and a magnitude-5.5 aftershock struck about 18 minutes after the main quake.