A large but Conventional explosive detonation? And it could be anyone including tha Australian government, or with its permission.
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.
More than likely, a fuel air bomb. No radiation was detected. A coincidence involving a meteor is unlikely. In May, a huge explosion and by September, they are making Sarin gas?