The reality is there is simply insignificant information to come to any sort of a logical conclusion to the exact nature of this phenomenon.
We will need to obtain, as has been previously stated, either a series of photographs of the event, the EXACT date and time that this occurred, and/or obtain a wider shot of the entire structure of the event. At the present time with the singular photograph that we observe, all we will continue to do is to guess and, to be honest, throwing a dart blindfolded would yield just as good a guess.
Looking solitarily at this picture, it can go any direction. There is what *appears* to be a cloud base, albeit high, above the area of interest. As what was previously stated, the rich dark material indeed suggests smoke so we can't rule anything out or conclusively prove anything. What I will say with certainty is that this photograph is, indeed, fascinating, and I am hoping somebody will come out with more information so we can figure this bad boy out and rest this case.