The Fukushima Daini Nuclear Power Plant had one of its spent fuel cooling systems shut down briefly, though no measurable change in radiation levels was detected.

[9] The mainshock of 2011 was followed by a series of aftershocks off Japan's eastern coast most of which didn't crest over a 5.0 in magnitude; being felt mainly along the Fukushima coastline.

[9] Japanese authorities advised people in the coastal region of Fukushima to evacuate immediately due to a possible tsunami with waves of up to 3 metres (9 ft 10 in).

[11] Waves of up to one meter in height struck the Fukushima coast about an hour after the earthquake, and public broadcaster NHK reported the presence of a tsunami of 1.4 metres (4 ft 7 in) at Sendai, the capital city of Miyagi Prefecture.

[12][13][14] A later field survey found a local run up of 4.3 metres (14 ft 1 in) at Ohama Fishing Port on Miyato Island, Higashimatsushima where the wave damaged boats.

[17] Seventeen people were injured during the earthquake, including broken bones and cuts from falling objects, three of which were serious injuries[18] while only minor property damage was recorded.

[20] The earthquake caused the third reactor's spent fuel cooling systems of the Fukushima Daini Nuclear Power Plant to stop, though circulation was restored after about 100 minutes.