A 5.5 magnitude quake hit Indonesia's Bengkulu province on Thursday, but there were no immediate reports of any casualties or damage.
The quake struck at 7:16 am (0546 IST) with an epicentre 61 kilometres southwest of the town of Bintuhan, off the coast of Sumatra Island, the Jakarta Meteorology and Geophysics Agency said.
It struck at a depth of 22 kilometres but no tsunami warning was issued.
"There is no damage here," Bintuhan police officer Budi Santoso said.
Indonesia sits on the Pacific "Ring of Fire," where the meeting of continental plates causes high volcanic and seismic activity.