This is really an interesting phenomenon, and apparently one that seems to happen when volcanoes are erupting. If you look on Youtube, there are all kinds of videos and pictures of strange objects seen near the volcanoes everywhere, and even sometimes, they seem to be flying directly into the volcanoes. Here is a video of the one that you just posted pictures of, Joe, and you can actually see the UFO flying back and forth near the volcano. Sometimes, it seems to split into two separate ones, and then goes back together again. What on earth could the volcanoes have that would bring the UFO so close to the center of them when they are erupting ?