The death toll following the quake on the Indonesian holiday island of Lombok on Sunday is now at 227, according to the chief of the provincial search and rescue agency.
Dozens were killed in a 6.4 magnitude quake that struck Lombok on July 29.
The USGS said the latest quake had a magnitude of 5.9 - there are reports it brought down some buildings.
It said it did not have the potential to cause a tsunami.
Videos showed rubble strewn across streets and clouds of dust enveloping buildings.
He has said several times that the number of deaths will increase.
"We are still waiting for assessments from some of the more remote areas in the north of the island, but it is already clear that Sunday's natural disaster was exceptionally destructive", said Mr Rassi.
Makeshift medical facilities have been set up to treat the injured.
Authorities made announcements over loudspeakers at evacuation sites, urging people to remain calm and stay inside tents or find open space if they were inside or near buildings.
In Kopang Daya village in the hard-hit Tanjung district of north Lombok, a distraught family was burying their 13-year-old daughter who was struck by a collapsing wall and then trampled when the quake Sunday caused a stampede at her Islamic boarding school.
"We are still waiting for assessments from some of the more remote areas in the north of the island, but it is already clear that Sunday's quake was exceptionally destructive", Christopher Rassi, the head of a Red Cross assessment team on Lombok, said in a statement.
"I visited villages yesterday that were completely collapsed".
Thousands of tourists visiting Lombok - as well as the nearby Gili Islands and Bali - have been evacuated or have chosen to leave since the weekend.
The Indonesian Red Cross said it had set up 10 mobile clinics in the north of the island.
"We lack the infrastructure to perform operations because (they) need to be performed in a sterile place", Wibowo told AFP.