A shallow-undersea earthquake with a magnitude of 6.3 jolted Sumatra island earlier Sunday, however, suggested no potential danger of a tsunami, Xinhua quoted the Meteorology and Geophysics Agency as saying.

The quake, which struck at 00.07 a.m. (Jakarta time) Sunday (1707 GMT Saturday), had its epicentre at 119 km southwest Krui of Lampung province and a depth at 10 km under sea bed, an official of the agency stated.