02:40 GMT +323 July 2018
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    People walk past a street monitor showing a news report about North Korea's nuclear test, in Tokyo, Japan, September 3, 2017

    North Korea's Nuclear Test Site Collapsed, Needs to be Monitored – Chinese Study

    © REUTERS / Toru Hanai
    Asia & Pacific
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    The data in the Chinese study was collected in the wake of Pyongyang’s sixth nuclear test on September 3, which allegedly triggered four earthquakes over the subsequent weeks.

    According to the scientists at the University of Science and Technology of China, the first of those seismic events was detected eight-and-a-half minutes after the bomb went off and was “an onsite collapse toward the nuclear test center.”

    “In view of the research findings that the North Korean nuclear test site at Mantapsan has collapsed, it is necessary to continue to monitor any leakage of radioactive materials that may have been caused by the collapse,” the authors of the University of Science and Technology China paper wrote.

    Meanwhile, Chinese authorities have stated that they found no radiation risk from the samples collected along the border, Associated Press reported.

    READ MORE: 'Step Forward': World Reacts to North Korea's Freeze on Nuclear Testing

    On September 3, 2017, North Korea announced it had successfully conducted a test of a hydrogen bomb, with the yield of the device being estimated at more than 100 kilotons of TNT. On the same day, a Chinese seismological center registered a 6.3 magnitude earthquake in North Korea that was a “suspected explosion,” while South Korea’s weather agency detected an artificial 5.6 magnitude quake in areas in the North’s Hamgyeong Province.

    Last week, the KCNA news agency reported that Kim Jong-un was determined to advance the de-nuclearization of the Korean peninsula, planned to suspend nuclear and missile tests and to focus on economic growth instead.

    North Korea’s de-nuclearization is expected to be discussed at a groundbreaking summit between Kim Jong-un and US President Donald Trump by June.

    Related:

    North Korea’s Nuclear Test Site Remains 'Fully Operational’, US Watchdog Claims
    South Korean President Welcomes Nuclear Tests Halt by North Korea
    'Step Forward': World Reacts to North Korea's Freeze on Nuclear Testing
    Japan’s Abe Lauds North Korea Move to End Nuclear Tests
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