An earthquake measuring 5.7 on the Richter scale shook the eastern Indonesian island of Sulawesi at 7.02am Irish time this morning.
There were no immediate reports of casualties or property damage.
The epicentre was 219km northeast of the main coastal town of Manado.
The tremor, measured at a depth of 44km, was also felt by residents in the nearby town of Tondano.
In March, an 8.7 magnitude earthquake killed more than 900 people on Nias off the southwest coast of Sumatra.
Indonesia sits on the so-called Pacific Rim of Fire, where the meeting of continental plates causes high volcanic and seismic activity.
A 9.3 magnitude quake along the same fault-line triggered last year's Indian Ocean tsunami disaster which left more than 217,000 people dead or missing.
