A strong earthquake rattled central Indonesia on Tuesday, a meteorological agency said, but there were no immediate reports of damage or casualties.
The 6.1-magnitude temblor was centered in Sangihe, an island 360 kms northeast of North Sulawesi's provincial capital Manado, the US Geological Survey said on its website.
It struck at 11:03 am and was the most powerful of six quakes to hit the same region in the last two days.
Local officials said they had no immediate reports of damage or casualties on the remote, sparsely populated island.
Indonesia, the world's largest archipelago, is prone to seismic upheavals due to its location on the so-called Pacific "Ring of Fire," a string of volcanoes and fault lines encirling the Pacfic Basin.