Overview
- Japan’s meteorological agency first estimated magnitude 7.2, revised it to 7.6 in briefings, and later set the quake at 7.5 off Aomori.
- Tsunami warnings covered Hokkaido and northeastern Honshu, with observed waves peaking at about 70 centimeters before alerts were lifted.
- At least 30 people were injured with no deaths reported, as emergency tallies rose from initial counts and many injuries were linked to falling objects.
- Japan notified the IAEA that nuclear facilities reported no anomalies, including at Fukushima, where ALPS-treated water discharge was paused as a precaution.
- A magnitude 6.4 aftershock was recorded off Aomori, and officials put the one-week probability of a larger event at roughly 1% versus a typical 0.1%.