 On September 9, 2016, a 5.3 seismic tremor was detected by seismograms in surrounding countries, after which North Korea confirmed it conducted another nuclear test.North Korea stated that this test has enabled them to confirm that its warhead can be mounted to a missile and to verify the warhead's power.It was previously doubted that North Korea could pair the nuclear warhead and missile together, but South Korean experts started to believe that North Korea can accomplish this goal within a few years after the September 9 nuclear test.