Authorities said there was no threat of a tsunami.
The magnitude-6.3 earthquake was centered 28 kilometers (17 miles) northeast of the Alor island chain in East Nusatenggara province, according to Indonesia’s Meteorology and Geophysics Agency. The U.S. Geological Survey, which also put the magnitude at 6.3, said the quake had a depth of 14 kilometers (9 miles).
The Meteorology and Geophysics Agency said the quake did not have the potential to trigger a tsunami.
Indonesia, the world’s largest archipelago, is prone to seismic upheaval due to its location on the Pacific “Ring of Fire,” an arc of volcanoes and fault lines encircling the Pacific Basin.
In December 2004, a massive earthquake struck off Sumatra island and triggered a tsunami that killed more than 230,000 people in a dozen countries, including 160,000 in Indonesia’s westernmost province of Aceh.