In a most fascinating turn of events, South Korean seismologists have announced an unexplained event immediately following North Korea's latest nuclear weapons test.
Exactly 8½ minutes after North Korea’s underground hydrogen weapon detonation on Sep 3, seismologists were surprised to register another seismic event at the nuclear test site. Not matching the characteristics of another bomb, earthquake or landslide, subsequent satellite imagery of the test site revealed a horizontal shift, indicating a collapse.
Occam’s razor would tell us the most likely answer was that the tunnels simply collapsed from the stress of the nuclear test. But given Secretary of Defense James Mattis’ comments on Sept. 19 about possible “kinetic” military options for North Korea, the hypersonic technology we've discussed recently may well be in play.
Check out the History channel’s video for an interesting overview of the hypersonic kinetic technology.