
The quake struck at 10:12 am Jakarta time (0312 GMT) and its epicentre was about 81 kilometres north-east of Dili, the capital of East Timor, an official at Indonesia's National Meteorology and Geophysics Agency said.
The official, who identified himself only as Fadli, said the quake occurred about 10 kilometres beneath the seabed.
On the remote island of Alor, one of the Indonesian islands close to the quake's epicentre, residents felt a strong jolt, said Bayu, another seismologist at the agency's office.
"But we have so far received no reports of damages or injuries," said Bayu, who like many Indonesians goes only by one name.
Fadli said he still waiting a further report from Wetar Island, the island closest to the epicentre, but communication to the island was still not possible due to a poor link.
Indonesia, the world's largest archipelago nation, sits atop the Pacific Ocean's so-called ring of fire, where the meeting of continental plates causes high volcanic and seismic activity.//dpa