Speaking of John Keel and mysterious sounds from the sky, there are of course the "skyquakes" and the connection between possible overhead explosion and the UFO phenomena. Very good to hear that Keel isn't the only one talking about such things! Although it appears that he didn't consider skyquakes having to do with overhead meteor explosions
Now that you mention these sky quakes, I might have heard them at least three times last autumn! In connection with the sounds the strange annoying fact in our area were party-going youngsters usually had the habit of throwing firecrackers on Fridays and weekends: in the usual "party-goer time frame", like between 22:00 and 00:30am -, but very rarely on other workdays. When one exploded near the house, those were easy to identify, having that characteristic sound "Oh, those youngsters again!". However these youngsters were operating all over the city on streets further away too and the origin of those explosions were harder to ascertain. Are there people shooting somewhere? No. They could not have been automatic weapons / handgun fire, because we don't have those in our country.
Especially now in retrospect its annoying, because on workdays, late at night or around 01:00am - 03:00am, when I was working,
I heard these strange explosions, a deep sound, like remote massive artillery firerattling the window blinds and the priming effect of the firecrackers made me wonder:
- WTH is going on here?!
Youngsters were usually deep asleep by that time, so the sounds couldn't have been remote firecrackers: they were too deep, echoing and sounded massive anyway. Also we live in a peaceful country, so there is no war, no live heavy weapons fire.
They sounded as if a plane exploded midair or was going down and exploded hitting the ground. Probably what bombing of cities must have sounded during WW2? The sounds had the characteristic echo of like "large mortar heavy artillery".
Despite obviously not being firecrackers or of human origin, the thought still ran through my mind: "Who the heck could be playing with firecrackers so late?", as a result of priming: thanks youngsters!