A strong earthquake rocked northern and eastern Taiwan early Thursday, killing at least one person, seriously injuring another and leaving some areas without power, authorities said.

Officials said the quake registered 6.4 on the Richter scale and struck at 7:15 a.m. (5:15 p.m. MDT Wednesday) and was followed by an aftershock 13 minutes later.A 19-year-old quarry worker died in a rockslide triggered by the temblor centered about six miles beneath the sea bottom 15 miles east of Hua-lien. At least one person was reported seriously injured.