Overview
- Japan’s meteorological agency reported the main quake at about 17:03 local time off Iwate, initially at magnitude 6.7 and later cited as high as 6.9, while the USGS measured 6.8 at roughly 10 km depth.
- Small tsunami waves were observed at Miyako, Kuji, and Ofunato—peaking around 20 cm—and earlier about 10 cm at Ominato, with live TV images showing calm seas.
- The tsunami advisory for Iwate, which anticipated waves up to about one meter, was lifted roughly three hours after it was issued.
- At least 10 aftershocks followed, the strongest around magnitude 6.3, and authorities advised vigilance over the next several days.
- Initial reports noted Shinkansen delays and localized power outages, with no immediate injuries or major damage and no anomalies at nearby nuclear facilities.