The magnitude-6.2 tembor followed a 6.9 quake on Sunday that killed at least 131 people, damaged thousands of houses, and left 156,000 people homeless. "People are still traumatized".
The death toll from the Lombok natural disaster has risen dramatically to 347, the government-run news agency Antara has said.
The national disaster agency has said all those numbers are likely to increase, as more information comes in and more victims are found.
The governor of the province that includes Lombok where the quake was centered, the military, the national search and rescue agency and regent of North Lombok issued different death tolls that ranged from 226 to 381.
Aid begun trickling into some of the most isolated regions, officials said midday Thursday, but many people displaced by the quake still lack basic supplies.
He said they were also looking for people with untreated injuries.
"Please stay calm, this is just an aftershock and it will be over soon, there's no need to be scared", one official announced.More news: Arsenal near deal to sell Lucas Perez to West Ham
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Officials said about three-quarters of Lombok's rural north had been without electricity since Sunday, although power had since been restored in most areas.
Now in Ubud, he said everyone ran out of their hotels during the latest aftershock.
"My heart jumps if even the door slams hard".
The Indonesian island of Lombok has been hit by a strong tremor, as the search continues for victims of Sunday's natural disaster. "We are still scared to go into the house".
"We were stuck in the traffic while delivering aid, suddenly it felt like our vehicle was hit from behind, it was so strong", witness Sri Laksmi told AFP.
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.
People are seen running out of Bali's Ngurah Rai International Airport, Indonesia August 9, 2018 in this still image taken from a video obtained from social media.