A POWERFUL earthquake has rocked the popular Indonesian holiday island of Lombok, killing a reported 82 people, injuring dozens more and damaging buildings, officials said.
It's believed no Australians have been injured in the quake.
The seven-magnitude tremor struck just 10km underground, according to the US Geological Survey.
It was followed by two light to moderate secondary quakes and nearly two dozen aftershocks.
It was the second quake to hit Lombok, whose beaches and hiking trails draw holiday-makers from around the world, in a week.
Among the dead are a one-year-old and a 72-year-old, he said, adding that at least 52 people were injured.
Residents of the city described a strong jolt that sent people scrambling to get out of buildings.
"Everyone immediately ran out of their homes, everyone is panicking," Iman, who like many Indonesians has one name, told AFP.
Electricity was knocked out in several parts of the city and patients were evacuated from the main hospital, witnesses and officials said.
Pictures showed patients lying on their beds outside the clinic while doctors in blue scrubs attended to them.
Sutopo Purwo Nugroho, spokesman for Indonesia's disaster mitigation agency, said most of the damaged buildings in the city were built with substandard construction materials.
Officials issued a tsunami warning after the quake, but it was later cancelled. Seawater up to 13 centimetres deep poured into two villages, Dwikorita Karnawati, head of the agency for meteorology, climatology and geophysics, told local TV.
Australia's Home Affairs minister Peter Dutton, who is in Lombok for a counter-terrorism meeting, told Fairfax Mediathat the quake "was powerful enough to put us on the floor".
The quake caused light damage as far away as the Javanese city of Bandung, some 955 kilometres from Mataram, but was felt strongly on the neighbouring resort island of Bali.
One local tweeted pictures of destruction at a shopping centre in Kuta.
Prime Minister Malcolm Turnbull told the Nine Network this morning that, at this stage, authorities had no reports of Australians being injured in the quake.
He will be contacting his Indonesian counterpart today to offer Australia's assistance for disaster relief efforts.
"Our thoughts and prayers are with the people of Indonesia, particularly the people of Lombok, where the earthquake occurred," Mr Turnbull said.
"We always reach out to our neighbours when natural disaster strikes."
CELEBS, POLITICIANS CAUGHT IN QUAKE
Australian actress Teresa Palmer is among a number of celebrities holidaying on Bali who tweeted about the magnitude 7.0 earthquake that struck on nearby Lombok island.
Another was American model and television presenter Chrissy Teigen who posted a series of brief updates on her Twitter profile.
The Lip Sync Battle host initially wrote: "Oh my god. Bali. Trembling. So long.", before adding "Phewwwwww", indicating that the tremors had stopped.
Teigen, 32, is with her husband, singer John Legend, and their two young children Luna and Miles.
The former Sports Illustrated cover star revealed the house in which they are staying is elevated from the ground, which added to the terrifying experience.
Teigen wrote: "Oh man. We are on stilts. It felt like a ride. 15 solid seconds of 'holy s*** this is happening.
"I very calmly walked outside saying clutching baby saying 'I'm naked. I'm naked. I'm naked'. Like a naked zombie."
Teigen then confirmed that aftershocks from the quake had started to hit the area.
She wrote: "I'm either still trembling or these little quakes won't stop. I'm trying to be normal here!".
Palmer said she felt the earthquake from where she was staying in a treehouse in Bali.
She tweeted: "We felt it here in Ubud and it was VIOLENT. We are staying in a treehouse and it was swaying like crazy. Very scary. Stay safe everyone."
She added: "It was very scary and we are in Bali, I can't imagine how it must've felt to those closer to Lombok. Thinking of everyone affected."
Bali. Trembling. So long.— christine teigen (@chrissyteigen) August 5, 2018
Take That star Gary Barlow is also on holiday in Bali, and posted a message on Twitter assuring fans that he was fine.
"Thank you for your concern - we're all fine - a bit shaken up," he said.
Singapore's Home Affairs Minister K. Shanmugam, who was in Lombok for a security conference when the earthquake struck, described on Facebook how his hotel room on the 10th floor shook violently.
"Walls cracked, it was quite impossible to stand up," he said.
Witnesses described how people could be heard screaming as locals and tourists ran onto the road. Agung Widodo, a resident of Bali's main town of Denpasar, said he felt two strong tremors.
"The first one lasted quite a while, the second one was only about two-to-five seconds. The first one was the bigger one," he told AFP.
Bali's international airport suffered damage to its terminal but the runway was unaffected and operations had returned to normal, disaster agency officials said.
Facilities at Lombok's main airport were also unaffected, although passengers were briefly evacuated from the main terminal.
Early reports suggest the quake wrecked buildings in several districts across Bali.
Indonesia, one of the most disaster-prone nations on earth, straddles the so-called Pacific "Ring of Fire", where tectonic plates collide and many of the world's volcanic eruptions and earthquakes occur.
In 2004 a tsunami triggered by a magnitude 9.3 undersea earthquake off the coast of Sumatra in western Indonesia killed 220,000 people in countries around the Indian Ocean, including 168,000 in Indonesia.