JAKARTA -- A shallow-undersea quake with a magnitude of 6.3 jolted Sumatra island early Sunday, the Meteorology and Geophysics Agency reported here.

The quake struck at 00:07 am Jakarta time Sunday (1707 GMT Saturday) with epicenter at 119 km southwest Krui of Lampung province and with the depth at 10 km under sea bed, an official of the agency who identified himself only as Sujabar told Xinhua by phone.

The intensity of the quake was felt at 4 MMI (Modified Mercally Intensity) in Krui and 3 to 4 MMI in Liwa of Lampung province and 2 MMI in Kepahiang of nearby Bengkulu province, he said.

Local officials at meteorology and geophysics agencies in Lampung and Bengkulu provinces reported that there were no immediate reports of damage and fatality, he said.

The USGS reported on its website that the quake was at 5.6 magnitude.

Indonesia sits on a vulnerable quake-hit zone so called the " Pacific Ring of Fire," where two continental plates meet and cause frequent seismic and volcanic movements.