The US Geological Survey says the quake struck from ten kilometres below the earth's crust.
The natural disaster hit a week after a magnitude-6.4 temblor killed 17 people, injured more than 160, and caused widespread damage to buildings.
Lombok's beaches and hiking trails draw holidaymakers from around the world.
Sutopo said the death toll had risen to 91 and more than200 people were seriously injured. In 2004, the Indian Ocean tsunami killed 226,000 people in 13 countries, including more than 120,000 in Indonesia.
The authorities had carried a rescue operation for the trapped tourists in landslides on Mount Rinjani, an active volcano on the Lombok island.
The tremor was powerful enough to be felt on the neighbouring island of Bali where, BNPB said, two people died.
The Bali and Lombok airports continued operating on Sunday night, according to the director general of civil aviation.
The model, along with singer-husband John Legend and their two children, felt the shaking while on vacation in neighboring Bali on Sunday. And now I can't contact her. Some of them said their own houses had been destroyed but they were still helping us".
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Juanda said: "I stayed (inside) during the first shock but the shock grew stronger and we rolled around trying to run out and I was already outside. when the mosque collapsed".
Home Affairs Minister Peter Dutton told Fairfax Media that he was on the hotel's 12th floor when the quake struck.
"Throughout the entire process, there's been no official information, it's all been what you hear from the locals", he said.
Another said: "Not so big as yesterday but was quite sustained".
Plan International in Indonesia has a focus on the wellbeing of children and parents and has responded quickly and effectively to support children and communities affected by emergencies in recent emergencies in the country, including the Mt Sinabung and Mt Raung volcano eruptions, and the Aceh natural disaster.
The head of the disaster management agency in Indonesia's West Nusa Tenggara province, Muhammad Rum, says the death toll from an quake that hit the tourist island of Lombok has risen to 39.
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Hundreds of people in Lombok have been left homeless and are staying in temporary camps amid continuing aftershocks. A Malaysian was among the dead, with another six citizens injured, the foreign ministry in Kuala Lumpur said.
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