Sakurajima has been erupting recently. These shots were taken today (April 26). If you go to the 58-second mark, you’ll see what is alleged to be a UFO. The further allegation is that it’s smoothing out the eruption. I don’t know the truth myself, but I wouldn’t be surprised if the allegations proved true, but we’d need further confirmation of that before the issue could be settled.
If you go to the 9:20 mark, you’ll see another eruption, not earth-shaking but clear. Thanks to Lou.