Overview
- Japan’s meteorological agency recorded the offshore earthquake near Iwate at 17:03 local time.
- Authorities issued a tsunami alert warning of possible waves up to one meter.
- Coastal gauges logged an initial wave too small to measure at Miyako and a 10‑centimeter wave at Ofunato.
- The U.S. Geological Survey assessed the quake at magnitude 6.8, slightly higher than the JMA estimate.
- Aftershocks between magnitude 5.3 and 6.3 were reported as broadcasters urged residents to stay away from the shore.