via USGS

Update: Japan lifted the tsunami warning some four hours after the powerful quake. The largest recorded wave was 1.4 metres (4.6 feet).

Earlier:

A tsunami warning is in effect for Japan’s Fukushima Prefecture after an earthquake with a magnitude of 7.4-magnitude struck off Honshu.

The quake occurred on Tuesday morning at 5:59 a.m. local time according to the Japan Meteorological Agency. The depth was initially estimated to be 10km, later revised to 25km.

In 2011, a large tsunami triggered by an earthquake destroyed the Fukushima nuclear power plant.

No tsunami warning has been issued for BC.

Tepco (Tokyo Electric Power Company Holdings) reported that the cooling system at the Fukushima nuclear power plant No. 2 reactor #3, had stopped working in the storage pond. The cooling system was restarted approximately 90 minutes later, following an inspection.

NHK World has a live video feed of the latest on the situation: http://www3.nhk.or.jp/nhkworld/en/live/