The density of the “smoke” and the density of what you’re presuming to be the “anvil” aren’t even close in the original image. It’s something flying, fairly close to the ground and kicking up dust. What that something might be is open to conjecture. Looks like a “flying wing” to me.
When a flying wing kicks up dust, the dust underneath swirls.
Look at that initial picture. It’s clearly rising black smoke going up into a common inversion.
See the density of the second picture that I posted above, the “up close” shot.