At least four small tsunamis were detected following the earthquake. Fukushima's Iwaki City shore detected a tsunami around 6:49 a.m. local time, according to the Japan Broadcasting Corp. (NHK), which broadcast a live shot from the city's Onahama port. A 2-foot-high tsunami was observed at the post at 6:49 a.m. local time.
Tsunamis were also detected at Katsuura port in Chiba prefecture, Soma port in Fukushima prefecture and Oarai port in Ibaragi prefecture at just after 7 a.m. local time, NHK reported.
Minor injuries were reported.