I'm glad to see all the funnies being posted. It tells me that the whole thing may be a hoax, but again,these loud hums and rumblings were supposedly heard by many people in many areas of the world and due to my interest in prophecy, I do a little of my own research on things regarding it so this caught my eye.
They've purportedly been heard in Czeck Republic, several places in Canada such as Montreal and Edmonton and conklin, Costa Rica,Ukraine, Amarillo TX., Pennsylvania, Glasgow, Germany, etc and were supposedly heard on or about Jan 17, 18 of this year. Even some mainstream news networks and local stations did some reports on it.
I personally thing it's99% baloney but stranger things have happened on this crazy world. If nobody reports sharing the experience on this post then I'll be satisfied with considering the whole situation debunked.
As they say, "Curiosity killed the cat...but for a while I was a suspect."