An earthquake measuring 6.2 on the Richter scale shook parts of eastern Indonesia on Saturday but there were no reports of damage or casualties.
The quake's epicentre was near Seram Island in Maluku province, 180 km northeast of the provincial capital Ambon, according to an official at the Jakarta meteorology and geophysics agency.
Meanwhile, a 5.6-magnitude earthquake struck off the western coast of Sumatra island early on Saturday but there were no reports of damage or a possible tsunami.
The temblor struck around 1.20 am in the Indian Ocean, about 75 Km southeast of the capital Banda Aceh, according to the agency official.
In December 2004, a 9.1-magnitude quake triggered a tsunami that struck nine countries, killing some 177,000 people alone in Aceh and wiping out entire villages.