Overview
- A magnitude 7.4 earthquake off northern Iwate in the Pacific struck Japan on Monday at a depth of about 10 kilometers.
- The Japan Meteorological Agency issued a tsunami alert for Iwate and parts of Hokkaido and Aomori with waves up to three meters, and advisories of about one meter for other northeast coasts.
- Strong shaking reached Tokyo hundreds of kilometers away, where tall buildings swayed.
- Authorities began impact assessments, with no confirmed casualties or major damage in early reports.
- Shallow earthquakes around 10 kilometers deep often intensify surface shaking and increase tsunami risk, which explains the rapid warnings from Japan’s meteorological agency.