A magnitude 6.1 earthquake jolted Java island of Indonesia on Tuesday, but there were no potential for tsunami and no casualty reported, officials said.

The quake jolted at 07:14 a.m. Jakarta time (0014 GMT) with epicenter at 170 km southeast Blitar of East Java and at a depth of 25 km under sea bed, Jajat Djatmika, official of the Meteorology and Geophysics Agency, told Xinhua by phone.

The intensity of the quake was felt at 4 MMI (Modified Mercally Intensity) at Blitar, 3 to 4 MMI at Karang Kates, and 4 MMI in Yogyakarta, he said.

Local Disaster Management and Mitigation Agency in East Java confirmed that there were no immediate report of damage or casualty in the province, J.R. Mahmud told Xinhua by phone from East Java.

Indonesia sits on the Pacific "Ring of Fire" where continental plates meet, causing frequent seismic and volcanic activity.