Tsunami warning cancelled after quake cut power to 2m homes and damaged some buildings

A powerful 7.4 magnitude earthquake struck off the coast of Fukushima in northern Japan on Wednesday evening, leaving four dead, and plunging more than 2m homes in the Tokyo area into darkness.

The region is part of northern Japan that was devastated by a deadly 9.0 quake and tsunami 11 years ago that also triggered nuclear plant meltdowns, spewing massive radiation that still makes some parts uninhabitable.