You started it, you produce it.
SAR, Seismic, 5.2EQ, 100kton impact, at base of mt, most narratives speculative via Chinese scientists, some German satellite imaging but nothing conclusive, no response from US sources other than Berkeley parroting Chinese unreliable reports, US mostly quiet. Mattis quiet after going public with 15-minute statement, speculative radiation leak but none observed.
Nothing is concluded by world press or public/academic data. US military has data but none released <— indicator
Not worthy of further discussion as data accessible by universities, labs, non-military satellites and public view are not conclusive.
Nothing available to public is reliable.
What is known is that NK is in fear and Gen. Mattis does not make idle non-serious statements.