Very funny , according to specialists it was the frost but they could be wrong. I've personally heard it , and was coming from the sky above not ground.
It sounded identical to what i've heard when i was young back in eastern Europe which was the exploding sound of MIG fighting jets reaching the sound barrier.
So yeah i think there was an object in the sky reaching the sound barrier producing that louder boom not icy frosting crap...
Edited by qxcontinuum, 27 December 2013 - 06:53 AM.