I found this suspicious claim on Facebook. Apparently some "scientists" recorded sound 15km under the surface and it sounds like ...hell.
This is the claimed story of the video
In the 1980's a drilling team in Siberia drilled into hell and recorded it. Dr Azzacove was present and this is what he stated. "As a communist I don’t believe in heaven or the Bible, but as a scientist I now believe in hell," said Dr. Azzacove. "Needless to say we were shocked to make such a discovery. But we know what we saw and we know what we heard. And we are absolutely convinced that we drilled through the gates of hell!" Dr. Azzacove continued, ". . .the drill suddenly began to rotate wildly, indicating that we had reached a large empty pocket or cavern. Temperature sensors showed a dramatic increase in heat to 2,000 degrees Fahrenheit. We lowered a microphone, designed to detect the sounds of plate movements down the shaft. But instead of plate movements we heard a human voice screaming in pain! At first we thought the sound was coming from our own equipment. But when we made adjustments our worst suspicions were confirmed. The screams weren’t those of a single human, they were the screams of millions of humans!"
We already know that the story is not true, but what is the origin of this sound?