The number of wounded people after the shallow powerful quake of 6.8 magnitude in Bali tourist resort on Thursday has increased to at least 63, nine of whom seriously suffer broken bones and other serious wound, official said.

A minivan is crushed by a chunk of concrete fallen from a building after an earthquake shook Indonesia's resort island of Bali October 13.

"So far the number of injured persons increases to 63, nine of whom are still having medical treatment at the emergency unit at hospitals, they had broken bones, head wound and others serious injury," official at Bali Disaster Management and Mitigation Agency Eka Purwata told Xinhua over phone.

Don't miss: Strong earthquake hits tourist island of Bali Video: 6.8 magnitude earthquake hits Bali, 63 injured

The number of victim was expected to rise as not all reports from affected areas had been received by the agency, he said.

The quake hit the island Thursday morning with epicenter at 143 km southwest Nusadua of Bali and with the depth at 10 km under sea bed, an official of the Meteorology and Geophysics Agency named only Appriallianto told Xinhua.

The intensity of the quake was felt at 4 to 5 MMI (Modified Mercally Intensity) at coastal tourist resort of Kuta of Bali province and Mataram of West Nusa Tenggara province, 3 to 4 MMI in Madura island of East Java province, he said.

The USGS reported on its website that the quake was measured at 6.1 magnitude.

The shakes of the quake could be felt in nearby provinces of East Java and West Nusatenggara,the official said.

A moderate aftershock with magnitude of 5.6 struck off the resort Thursday afternoon with epicenter at 131 km southwest Nusadua and with the depth at 10 km under sea bed, an official of the meteorology agency said.

Indonesia, homed by 129 active volcanoes, is prone to earthquake as it lies on a vulnerable quake-hit zone so called " the Pacific Ring of Fire", where two continental plates stretching from Japan to Western hemisphere meet that frequently cause seismic and volcanic movements.