I think I'm going to go all out on this. Something really out of the ordinary is happening.
Two years ago I was out for a late evening walk when about two or three blocks from home I heard a really, REALLY peculiar sound coming from the sky. It didn't sound like an airplane, traffic, or anything else I can think of. The sound completely encompassed the whole sky. The weather was calm and there wasn't a cloud in the sky. It came from every direction. Whatever direction I walked, the sound was just the same, it didn't trail off. After about 10 minutes after listening to this, I got second thought about talking finishing my walk and headed back home. I swear, it was the closet thing I've ever encountered that could be considered paranormal.
Nonetheless, after a few weeks, I completely forgot about the incident. I figured there was some logical explanation behind the sound. Until later in the year I was up late listening to AM radio, and on this show Coast to Coast AM, they were talking about all these reports of strange sounds from the sky. They mentioned videos of the phenomenon that have been posted on You Tube. Sure enough, these videos of the sound, while not quite identical, are very much like what I heard back in the spring of 2011.
I've been following this strange phenomenon. It's very real, and very unusual. You need to hear it first hand and not over the internet to truly experience this event. People have described the sounds as trumpets, or horns, roaring of jet engines, roaring of wind (when there is no wind), whirring, clanging of cymbals or of gongs, some sounds go beyond description. Some sounds sound like something from a horror movie.
There are many videos of this strangeness, many recorded on people's smart phones. Granted, there are some faked videos. But the videos that are hoaxes are from skeptics trying like hell to debunk the legitimate videos.
People have claim the sounds are Apocalyptic, or from UFOs. Some say the sounds are from HAARP. Some people say the sounds have something to with do with the shifting of the magnetic poles. All I can say is that what I heard sounded pretty damn ominous. Check some of these videos:
There are many, many other videos out there, from all corners of the globe: England, Spain, Ukraine, New Zealand, Brazil, Denver, Seattle, Tampa Bay, Michigan, etc. etc. etc.