Transcript
The quakes have triggered massive landslides which have cut off already remote villages, buried food gardens and contaminated water supplies.
The provincial administrator for Southern Highlands,Thomas Eluh, says 45 deaths have been counted across his province.
He says the death toll may keep rising as aftershocks continue.
"It's still a problem as it occurs on a daily basis, and we still have landslides. Yesterday unfortunately five more people were added to the figure. It was on forty yesterday, but with the latest earthquake triggered a house to fall on top of a family, and then five of them died as a result of it."
The death toll is around 50 in neighbouring Hela.
But because disaster assessment teams have been unable to reach many parts, the number is expected to rise.
The doctor in charge of the medical response in Hela says many people in remote areas are yet to receive any assistance.
Tana Kiak has spent the days since helicoptering and walking from village-to-village helping the injured and tallying the death-toll in areas where entire villages have been wiped out by landslides.
Dr Kiak says some villages are on the edges of mountainsides, with the loose ground being ratlled by constant aftershocks, and they need help to move.
"People are so scared. For me, the national government should think of finding them temporary shelter somewhere that's much safer. Some people are living on the plateau, the cliff, and there's a crack on the ground where the next earthquake might push them down into the valley. But they're pretty much scared and they're asking for help."
Tana Kiak says outside assistance is still to reach much of the province, and he says conditions are starting to become ripe for an epidemic.
"We need to think about the public health issues. You know, the outbreak of diarrheal disease, pneumonia - people sleeping out and getting pneumonia or other diseases, you know. These are the kind of things we need to start addressing now otherwise we will have an epidemic of those diseases."
Dr Kiak says aid agencies and donor countries are bringing supplies to the region, but they are slow in arriving.
Eleven days after the major quake, Mr Eluh said disaster officers have managed a general assessment of most areas in Southern highlands.
"We have about six care centres where people have congregated into. Unfortunately the roads are still blocked at the moment, and we are working on it right as we speak. To get to the care centres in most of the affected areas, by this time they are only accessible by chopper."
Thomas Eluh says the most pressing needs for around five thousand people in the care centres are food, water and medical supplies.
There's also a general need for shelter around the province, with many homes damaged by the quake and mass landslides.
According to the administrator, relief supply packages from Port Moresby arrived in the provincial capital Mendi yesterday.
Mr Eluh says he's been told there will be more to follow soon.