The aftershock comes just four days after a devastating 6.9-magnitude quake struck Lombok, which relief agencies said had wiped out entire villages in the worst-hit regions in the north and west.
Indonesia's national disaster agency has the official figure at 131 following the 7.0 magnitude quake which struck the north of the island - and also caused fatalities in neighbouring Bali.
It said it did not have the potential to cause a tsunami.
A strong aftershock has shaken the Indonesian island of Lombok where tens of thousands of people are homeless after a powerful natural disaster on Sunday.
"Evacuees and people ran out of houses when they felt the strong shake of the 6.2 magnitude quake".
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Members of an Indonesian search and rescue team look for victim of the recent quake in Tanjung on Lombok island on August 9, 2018.
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He said the agency has sent 20 water vehicles to five remote areas, including one village of about 1,200 households.
Displaced residents living in shelters rushed out of their temporary homes, fearing more destruction to structures already weakened from the previous two quakes.
Officials said the death toll had now risen to 319 and tens of thousands of people are homeless.
Thousands of people have been sleeping in makeshift shelters or out in the open.
Indonesia is prone to earthquakes because of its location on the "Ring of Fire", an arc of volcanoes and fault lines in the Pacific Basin.
The National Disaster Mitigation Agency said that at least 131 people were killed in Sunday's quake, but other agencies say the death toll has risen to more than 300.
Across much of the island, a popular tourist destination, once-bustling villages have been turned into virtual ghost towns.
Kurniawan Eko Wibowo, a doctor at the field hospital, said most patients had broken bones and head injuries.