The South China Morning Post is reporting that “North Korea’s mountain nuclear test site has collapsed, putting China and other nearby nations at unprecedented risk of radioactive exposure, two separate groups of Chinese scientists studying the issue have confirmed … [and] … The collapse after five nuclear blasts may be why North Korean leader Kim Jong-un declared last Friday that he would freeze the hermit state’s nuclear and missile tests and shut down the site, one researcher said.“
The report says that “A research team led by Wen Lianxing, a geologist with the University of Science and Technology of China in Hefei, concluded the collapse occurred following the detonation last autumn of North Korea’s most powerful thermal nuclear warhead in a tunnel about 700 metres (2,296 feet) below the mountain’s peak … [and] … The test turned the mountain into fragile fragments, the researchers found.“
“North Korea,” the report says, “saw the mountain as an ideal location for underground nuclear experiments because of its elevation – it stood more than 2,100 metres (6,888 feet) above sea level – and its terrain of thick, gentle slopes that seemed capable of resisting structural damage … [and] … The mountain’s surface had shown no visible damage after four underground nuclear tests before 2017 … [but] … the 100-kilotonne bomb that went off on September 3 vaporised surrounding rocks with unprecedented heat and opened a space that was up to 200 metres (656 feet) in diameter, according to a statement posted on the Wen team’s website on Monday.”
Professor Wen’s reports is due to be published by the peer-reviewed journal, Geophysical Research Letters, next month.
Some analysts suggest that this is why Kim Jong-un has offered to suspend nuclear tests: his test site has collapsed!