Jakarta, Nov 7 : A 6.2-magnitude earthquake struck off North Sulawesi province in the eastern part of Indonesia but no preliminary report on damages or casualty was issued, an Agency and a Disaster official said. The Meteorology, Climatology and Geophysics Agency did not issue any tsunami warning as the quake did not potentially trigger giant waves. The quake rocked at 9:37 p.m. Jakarta time (1437 GMT) on Saturday with the epicentre at 71 km southeast of Bolaang Mongondow district and at the depth of 20 km under the seabed, the Agency reported. Joi Oroh, the Provincial Disaster Management Agency's Head, said there were no preliminary reports on damages or people killed by the earthquake, Xinhua news agency reported. In the two hardest-hit areas, Bolaang Mongondow Timur district and Kotamobgu town, the official said he had not received any report on damage or casualty after the quake. Indonesia, a vast archipelagic nation, is frequently stricken by earthquakes as it lies on the Pacific ring of fire. /IANS