Overview

• The quake struck around 12:20–12:21 a.m. on October 5 local time, according to initial reports.
• Maximum shaking of shindo 4 was recorded in Futaba Town in Fukushima Prefecture.
• Shindo 3 was observed across numerous municipalities in Fukushima and parts of Miyagi, Ibaraki, Tochigi, and Chiba, including Iwaki, Soma, Minamisoma, Natori, Ishinomaki, Hitachi, and Ōtawara.
• JMA estimated the magnitude at 5.7 with an offshore Fukushima epicenter at roughly 50 kilometers depth.
• No tsunami warning was issued and early reports did not indicate major damage, with authorities continuing routine monitoring for aftershocks.