Several provinces in the highlands of Papua New Guinea felt strong aftershocks.
Frightened civilians have been stroke by a minor after quakes, as one quake reached 6.0 magnitude in the Southern Highlands, Western, Enga and Heladistricts. Scores of people reportedly have been killed since a magnitude-7.5 quake rocked the nation on February 26th.
Around 7,000 people have been rendered homeless, and 1.47 lakh are in need of food, water and sanitation facilities, the director of the International Red Cross in Papua New Guinea told Reuters.
"The challenge is road access, it's still not accessible to trucks and four-wheel drives", Regmi said. Landslides sparked by the quakes have wrought havoc on the land: food was reportedly becoming scarce in certain areas due to inaccessible roadways, BBC News reported.
"We just got a call from one of the remotest locations, Mt Bosavi", he said.
The death toll has now reached some 70 people as the natural disaster triggered landslides, destroyed buildings, and closed down oil and gas operations.
"Public health and public hygiene are now concerns", Anna Bryan, program director for CARE International in PNG, said.
Professor Petley said there was an urgent need to assess the risk of collapse and determine how many people lived downstream.
The Australian and New Zealand defence forces have begun delivering aid and the China Red Cross and Beijing have pledged financial assistance, said PNG Post-Courier.
There were no immediate reports of casualties or damage from the latest temblors.
PNG company Oil Search said it would donate up to $6.4 million in cash and in kind support for disaster relief, while worldwide giant Exxon Mobil said it would give $1.3 million. Oil Search Ltd and Santos are also project partners.