According to Indonesia's geological agency, Thursday's quake had a magnitude of 6.2 and was shallow, striking at a depth of just 12 kilometres.
The quake was the second in a week to hit Lombok.
The natural disaster killed more than 100 people in Lombok and injured hundreds of others, leaving thousands of locals homeless and tourists stranded.
The Indonesian Red Cross said it had set up 10 mobile clinics in the north of the island.
So far, 355 aftershocks have been felt following Sunday's magnitude 6.9 quake, National Disaster Mitigation Agency spokesman Sutopo Nugroho said.
It said it didn't have the potential to cause a tsunami.
The US Geological Survey has measured it at magnitude 5.8.
The Indonesian island of Lombok was shaken by a third big natural disaster in little more than a week on Thursday as the official death toll from the most powerful of the quakes topped 300.
The new tremor hit off the north-west coast of Lombok, sending people running into the streets in panic.
Officials said the death toll had now risen to 319 and tens of thousands of people are homeless.
The government says more than 1400 people were injured and more than 156,000 displaced.
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Rescuers are finding some remote areas hard to reach because bridges and roads have been destroyed by the natural disaster.
"I visited villages yesterday that were completely collapsed", he said, while other teams in East and North Lombok had reported villages where 75 percent of homes were damaged.
There are fears that two collapsed mosques in north Lombok had been filled with worshippers.
BNPB's official death toll from Sunday's quake stood at 131 on Wednesday, although some Indonesian officials put the number at 347.
Tourists had evacuated or left the country themselves following Sunday's quake.
Some evacuees have complained of being ignored or experiencing long delays for supplies to arrive at shelters.
Muhammad Zainul Majdi, governor of the West Nusa Tenggara region which covers Lombok, said there was a dire need for medical staff, food and medicine in the worst-hit places.
Hundreds of bloodied and bandaged victims have been treated outside damaged hospitals in the island's main city of Mataram and other badly affected areas.
"We lack the infrastructure to perform operations because (they) need to be performed in a sterile place", Wibowo told AFP.
Thousands of people have been sleeping in makeshift shelters or out in the open.
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