[MadMax, the Grinning Reaper]

any large explosion leaves traces, residue, dust particles, craters, smashed rocks, dirt, trees/vegetation, etc.

File this article under “FAKE NEWS DOWNUNDER”. Take two aspirin and call Quigley Downunder in the morning.

[SteveH]

I dunno, what if the explosion was set off in a cave deep underground? (Just speculating.)