A MOUNTAIN in North Korea believed to be the site of the supposed hydrogen bomb explosion - is at risk of collapsing and leaking radiation into the region.

Experts say if the peak crumbles, clouds of radioactive dust and gas will blanket the region, Hong Kong’s South China Morning Post reported.

11 The Punggye-ri test site in North Korea is carved deep into the side of Mount Mantap Credit: The Sun

11 A satellite image taken on April 12, 2017 of a North Korean Punggye-ri Nuclear Test Site Credit: Pleiades CNES/Airbus DS/38 North/Spot Image

11 North Korea state media celebrates its missile capability as tensions rise

The Punggye-ri test site in the rogue-nation’s northeast is carved deep into the side of Mount Mantap.

Geophysicist Wen Lianxing and his team at the University of Science and Technology of China in Hefei, Anhui province, said they “were confident” underground detonations were occurring underneath the mountain.

They posted an analysis of data collected from more than 100 seismic monitoring sites across China.

This has narrowed down the location of Pyongyang’s nuclear tests with a margin of error of just 100m. They’ve all been under the same mountain.

The research comes after Kim Jong-un conducted its sixth and most powerful nuclear test on in the mountain on Sunday.

North Korean state media claimed its underground test of the H-bomb is a major “game changer” and several shockwaves were recorded across the globe after the bomb’s supposed detonation.

11 The area around North Korea's Punggye-Ri nuclear test site shows graphics pointing to what monitoring group 38 North says are signs of increased activity Credit: Reuters

11 North Korea’s Punggye-ri Nuclear Test Site is seen in commercial satellite imagery taken April 12, 2017 Credit: Reuters

11 This satellite image provided by Airbus Defense & Space and 38 North on October 8, 2016 shows the Sohae Satellite Launching Station in North Korea Credit: AFP

Seismic data showed the underground test triggered an earthquake of magnitude 6.3, around ten times more powerful than the fifth test a year ago.

Satellite images showed the blast caused numerous landslides around the Punggye-ri test site, according to the Washington-based 38 North monitoring project.