The United States Geological Survey (USGS) recorded the latest quake at 5.9, with a depth of 10 km (6 miles). That number is expected to rise.
A man inspects the ruins of houses at a village affected by Sunday's quake in Kayangan, Lombok Island, Indonesia.
Facebook apologized for animated balloons and confetti appearing when Indonesian speakers posted messages about Sunday's deadly natural disaster on Indonesia's Lombok Island.
Authorities are gathering information from family members with missing relatives to determine how many more people may have been in the buildings when they collapsed, national search and rescue agency spokesman Yusuf Latif told AFP.
But disaster agency spokesman Sutopo Purwo Nugroho said in a statement the information from those sources was incomplete and hadn't been cross-checked for duplication.
The quake was the second in a week to hit Lombok.
'The corpses are starting to smell and we believe some people buried are still alive - that's why it's a critical time, ' Nugroho said.
Volunteers and rescue personnel have erected more temporary shelters for the tens of thousands left homeless on the island.
The Indonesian Red Cross said it had set up 10 mobile clinics in the north of the island.
The quake struck as evening prayers were being said across the Muslim-majority island and there are fears that one collapsed mosque in north Lombok had been filled with worshippers.
Across much of the island, a popular tourist destination, once-bustling villages have been turned into virtual ghost towns.
Some evacuees have complained of being ignored or experiencing long delays for supplies to arrive at shelters. "I do hope the government can help", she said.
The military said that five planes carrying food, medicine, blankets, field tents and water tankers left Jakarta for the island early on Wednesday.