Thousands of tourists have left Lombok since Sunday, fearing further earthquakes, some on extra flights provided by airlines and others on ferries to the neighbouring island of Bali.
Many people used the word "selamat" - meaning "to survive" - as they wrote about the magnitude 7.0 quake, which, CBS reports, killed at least 131 people.
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.
Wiranto said the government will develop a plan to rebuild communities on Lombok, which like its more famous neighbour Bali is a popular tourist destination with powder-white beaches, mountains and a lush interior.
The governor of the province that includes Lombok where the quake was centred, the military, the national search, and rescue agency and regent of North Lombok issued different death tolls that ranged from 226 to 381.
It said it did not have the potential to cause a tsunami. The United States Geological Survey measured the quake at 5.9.
'Evacuees and people ran out of houses when they felt the strong shake of the 6.2 magnitude quake.
Many frightened, displaced villagers are staying under tents or tarpaulins dotted along roads or in parched rice fields, and makeshift medical facilities have been set up to treat the injured.
Local authorities, global relief groups and the central government have begun organising aid, but shattered roads have slowed efforts to reach survivors in the mountainous north of Lombok, which bore the brunt of the quake.
He estimated 75 percent of houses are damaged in some villages in east and north Lombok.
Officials said the death toll had now risen to 319 and tens of thousands of people are homeless.
The island was still recovering after two other recent earthquakes when the tremor happened. More than 1,000 schools have been damaged, the organization said.