A strong 7.0-magnitude earthquake struck off the Indonesian island of Sulawesi on 12 April, the US Geological Survey (USGS) said.
The EMSC has reported that it registered a 6.8-magnitude earthquake at 11:40 GMT.
There were no immediate reports of casualties or damage.
Indonesia has reported that a tsunami is possible after the strong earthquake east of Sulawesi.
Indonesia is part of the so-called Ring of Fire, an area in the Pacific Ocean where the most active tectonic plates are located.