The US Geological Survey said the quake, felt on the nearby holiday island of Bali, measured 5.9 on the Richter scale.
The national disaster agency has stood by its figure of 131, saying that other numbers were coming from incomplete sources that had not been cross-checked for duplication.
Many buildings still standing on the island have been weakened.
Almost 1,500 people are in hospital with serious injuries and more than 156,000 have been displaced due to the extensive damage to thousands of homes.
The first quake, a 6.9 magnitude event, killed almost 350 people, according to Indonesian state media.
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The Indonesian Red Cross says it's focusing its Lombok natural disaster relief efforts on an estimated 20,000 people in remote areas in the north of the island where aid still has not reached. He also says they're continuing to look for people with untreated injuries.
"Today, we managed to find one dead victim buried under the rubble of a building in Sigar Penjalin village".
Many frightened villagers are staying under tents or tarpaulins dotted along roads or in parched rice fields.
Sutopo Purwo Nugroho, a spokesman for Indonesia's disaster agency, tweeted videos on Thursday showing what appeared to be new damage to buildings and power lines.
Across much of the island, a popular tourist destination, once-bustling villages have been turned into virtual ghost towns.
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The island was still recovering after two other recent earthquakes when the tremor happened. "Some paramedics have to be at the shelters, some need to be mobile", Majdi said.
But Mr Sutopo said some areas in the north had still not received any aid.
Some evacuees have complained of being ignored or experiencing long delays for supplies to arrive at shelters. "The grandson tried to help the grandmother to get out but he pushed too hard", she said.
Indonesia is prone to earthquakes as it is situated in the "Ring of Fire", an area in the basin of the Pacific Ocean where many tremors and volcanic eruptions occur.
Muhammad Zainul Majdi, the governor of West Nusa Tenggara province, said there was a critical need for medical staff, food and medicine, according to Ireland's RTE. Tens of thousands are now sleeping out in the open or in the ruins of their homes.
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