Reuters witnesses reporting on the aftermath of last Sunday's quake in the north of the island said people ran out onto roads in panic and some buildings collapsed.
The aftershock comes just four days after a devastating 6.9-magnitude natural disaster struck Lombok, which relief agencies said had wiped out entire villages in the worst-hit regions in the north and west.
Officials said the quake's epicenter was on land and so there was no risk of a tsunami.
Facebook users writing the Indonesian word "selamat"-which roughly translates to "unhurt" or "survive"- when referring to the 7.0-magnitude natural disaster reported seeing confetti and balloons when they were writing messages of sympathy to their friends and family on social media".
The latest quake was felt strongly on the island and followed a 7.0 magnitude quake on Sunday that killed at least 131 people.
Meanwhile the death toll from the powerful quake continues to rise, with 347 people now reported dead, according to CNN.
The military said five planes carrying food, medicine, blankets, field tents and water tankers left Jakarta for the island early Wednesday.
Officials said about three-quarters of Lombok's rural north had been without electricity since Sunday, although power had since been restored in most areas.
He also says they're continuing to look for people with untreated injuries.
A green and yellow dome rested on the pile of rubble, the only part of the structure still intact.
Most people live in basic housing in small communities.
Meanwhile, the evacuation of thousands of tourists from the Gili Islands - three tiny, coral-fringed tropical islands off the northwest coast of Lombok - has finished, officials said. Tens of thousands are now sleeping out in the open or in the ruins of their homes.
Indonesia is prone to earthquakes because it lies on the Ring of Fire - the line of frequent quakes and volcanic eruptions that circles virtually the entire Pacific rim.