A 6.4 magnitude earthquake jolted Sumatra island in Indonesia Wednesday, but no tsunami, damage or casualties were reported.

The Meteorology and Geophysics Agency said the earthquake's epicenter was 16 miles under the seabed some 101 miles northwest of Lais in Bengkulu province. The temblor struck at 2:27 p.m. local time.

The U.S. Geological Service registered the quake's magnitude at 6.1. "The earthquake carried no tsunami potential," the agency said.

Last week, an initial 8.4 magnitude earthquake rocked Sumatra's west coast, causing 23 casualties.

According to experts, aftershocks could still be felt for two weeks.