Jakarta  - A 7.0-magnitude earthquake struck Jambi province in central Sumatra Thursday morning, but there were no immediate reports of injuries or damage, seismologists said.

The quake struck at 8:52 am (0152 GMT) at a depth of 10 kilometres, about 46 kilometres south-east of Sungaipenuh in Jambi province, Indonesia's National Meteorological and Geophysics Agency (BMG) said.

The agency said there were no immediate reports of injury or structural damage from the quake, the second powerful earthquake to jolt Indonesia's Sumatra in less than 24 hours.

On Wednesday afternoon, a powerful 7.6-magnitude quake occurred off western Sumatra province, leaving at least 200 people dead and hundreds of others trapped under the rubble of collapsed homes, shops, hotels and other buildings, officials said.

Indonesia, the world's largest archipelago, sits on the Pacific "Ring of Fire," the edge of a tectonic plate prone to seismic upheaval.

A major earthquake and subsequent tsunami struck in December 2004, leaving more than 170,000 people dead or missing in Indonesia's Aceh province and half a million people homeless. (dpa)