An earthquake with a preliminary magnitude 6.2 jolted Miyake Island, while a possible 5.8-magnitude temblor struck Miyagi Prefecture on Wednesday evening, injuring at least four, the Meteorological Agency and the local fire department said.

The Miyagi quake, which occurred at 9:03 p.m., registered an intensity of lower 5 on the Japanese seismic scale to 7 in parts of the prefecture. The Fukushima No. 1 and No. 2 nuclear plants and the Onagawa nuclear plant in Miyagi were not affected, their operators said.

A 70-year-old woman in Sendai injured her hip when she fell due to the quake, Sendai's fire department said.