Residents across Japan's Pacific coast rushed to higher ground on Wednesday as tsunami warnings following a massive earthquake off Russia's Far East resurfaced painful memories and lessons from the devastating 2011 earthquake and nuclear disaster.

No abnormalities in plant parameters or equipment have been noted thus far, according to Tokyo Electric Power Company.

A powerful 8.7-magnitude earthquake near Russia's Kamchatka Peninsula triggered tsunami warnings across the Pacific. Japan evacuated Fukushima nuclear plant workers as a precaution, recalling the 2011 disaster.