Buildings still standing on the island have been weakened after Sunday's 6.9 quake that killed at least 131 people and a 6.4 quake on July 29 that killed 16.
This is a developing story.
BNPB's official death toll from Sunday's quake stood at 131 on Wednesday, although some Indonesian officials put the number at 347.
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.
Thousands of tourists have left Lombok since Sunday, fearing further earthquakes, some on extra flights provided by airlines and others on ferries to the neighboring island of Bali.
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 US Geological Survey has the tremor at a magnitude 5.9.
Motorcycles parked on the street in northern Lombok's Tanjung district toppled over and the walls of some nearby buildings collapsed.
An Indonesian man examines the remains of houses, after a 6.4 magnitude quake struck, in Lombok on 29 July, 2018.
"Access is tough, because the natural disaster [on Sunday] was so strong and paralyzed a lot of buildings", said Husni, a spokesman for the International Federation of the Red Cross who like many Indonesians goes by one name.
The Indonesian Red Cross said it's focusing its relief efforts on an estimated 20,000 people in remote areas in the island's north where aid still has not reached.
The military said it sent five planes carrying food, medicine, blankets, field tents and water tankers. They tended to an elderly woman with an injured face and hips who had been knocked over by her grandson as they scrambled from their house. "The grandson tried to help the grandmother to get out but he pushed too hard".
Indonesia is located on the Pacific "Ring of Fire".