South Korea's Gangwon province warned residents to take precautions and evacuate to higher grounds after a massive earthquake hit north central Japan on Monday and triggered tsunami warnings, according the safety ministry. It said tsunami waves of up to 0.3 metres could reach South Korea's eastern shore. Gangwon province told residents in emergency text messages to stay away from the coast and evacuate to higher ground. The city of Samcheok advised residents to move to areas higher than a three-storey building, the ministry of interior and safety said.