Jakarta - Another strong earthquake measuring 6.1 on the Richter scale struck a remote eastern Indonesian island of Sumba in East Nusa Tenggara Sunday morning, but there were no immediate reports of injury and damage, meteorologists said.

The quake took place at a depth of 16 kilometres, located about 176 kilometres south-west of Waingapu on Sumba Island. It occurred at 3:54 am Jakarta time (2054 GMT Saturday), the Indonesian Meteorology and Geophysics Agency (BMG) said.

The BMG's statement say the quake, the latest jolt to hit Indonesia in more than six hours, did not trigger a tsunami, and there were no immediate reports of injury or structural damage.

On late Saturday, a powerful 7.3-magnitude quake struck eastern islands on Maluku province at about 1440 GMT. A tsunami alert was cancelled about 30 minutes later after no giant waves materialized, and until Sunday morning, there were no immediate reports of structural damage or human casualties.

Indonesia, the world's largest archipelago nation, sits atop the Pacific Ocean's Ring of Fire, where the meeting of continental plates causes high volcanic and seismic activity.

On September 30, a powerful 7.6-magnitude quake struck off the western coast of Sumatra, killing more than 1,100 people and injuring hundreds of others. (dpa)