The earthquake occurred off the west coast of the Indonesian island of Sumatra, near the island of Nias.
Neither victims nor damage were reported, according to the emergency services.
A magnitude 6.6 earthquake hit the west coast of the northwestern Indonesian island of Sumatra on Friday, the American Institute of Geophysics (USGS) said as no casualties or damage occurred. have been reported.
The earthquake was recorded at 12:30 p.m. (8:30 a.m. in France) near the island of Nias, about 250 kilometers south of the town of Sinabang, capital of the island of Simeulue.
Nias Island Rescue Service spokesman Agus Wibisono said he did not appear to have suffered any casualties or damage.
He said that the tremors having been strong, the inhabitants panicked, especially those living along the coast, for fear of a tsunami.
A shake followed by a weaker aftershock
"The earthquake made me dizzy, but so far the buildings in my region do not seem to have been damaged," Sosial Zigoto, a tourist guide south of Nias Island, told AFP by phone.
The shock, felt quite strongly in Padang, the capital of West Sumatra, was followed by a weaker aftershock, again without damage or casualties.
An area regularly affected by earthquakes
Indonesia regularly faces earthquakes or volcanic eruptions, due to its position on the Pacific "ring of fire", where tectonic plates collide.
In 2018, an earthquake with a magnitude of 7.5 caused a tsunami that struck Palu, on the island of Sulawesi, causing the death or disappearance of 4,300 people.
But the country remains marked by the earthquake of December 26, 2004 with a magnitude of 9.1 off the coast of Sumatra, causing a major tsunami that had resulted in the death of 220,000 people throughout the region, for about 170,000 for the only Indonesia. It is one of the deadliest natural disasters on record.