The National Disaster Mitigation Agency had said more than 680 people were stranded on Rinjani, an active volcano.
"We jumped out of our beds to avoid anything falling on our heads", The Guardian quoted a tourist, Jean-Paul Volckaert, who was woken by the sudden jolt in Puncak hotel.
The constant aftershocks sparked terrified shouts among scores of people made homeless in the eastern village of Sembalun in the district of the same name, an AFP reporter said.
According to the government data, Mount Rinjani volcano, a popular tourist destination, draws hundreds of thousands of climbers every year. We were very surprised as the water in the pools was swaying like a wild sea.
The quake struck at 6.47am on Sunday (22.47 GMT on Saturday) and was only 4.35 miles deep (7km), a shallow depth that would have amplified its effect.
In 2016 a magnitude 6.5 quake struck off the north-east coast of Sumatra island, killing dozens of people and more than 40,000 having to leave their homes.
Over a hundred of subsequent tremors were recorded, with the largest aftershock recorded at 5.7 magnitude, Indonesia's Meteorological, Climatological and Geophysics Agency said. "All my neighbours also ran outside and the electricity was suddenly cut off", he told Agence France-Presse.
Man Utd pull plug on move for Barcelona defender Mina
And this development has led to United calling off their pursuit of Mina and turning their attention back towards Alderweireld. According to The Mirror , Manchester United are closing in on the Belgian International for a reported fee of 60 million.
The UK Foreign Office has confirmed that a number of British citizens have been reported safe on Lombok following the natural disaster, but would not say whether these included anyone still remaining on the mountain.
The US Geological Survey said the quake struck at a depth of only seven kilometres.
In 2016 a quake of a similar magnitude struck the Aceh region of Sumatra, killing 104 people and injuring more than a thousand.
Tipatai Phusit, a hiker from Thailand, was on top of Mount Rinjani when the natural disaster hit, and said he saw a number of people hit by rocks and debris.
The Indonesian archipelago where Lombok and Bali are located is part of the Pacific Ring of Fire, an area of intense seismic and volcanic activity. However, the region remains acutely alert to temblors that might trigger tsunamis.
In 2004, a huge 9.3 magnitude quake under the sea off the coast of the western island of Sumatra triggered a tsunami which killed 1,68,000 people in Indonesia and a further 50,000 people in various countries around the Indian Ocean.
That was followed a couple of hours later with: "Oh don't mind us just more earthquakes over here".