“Did anyone else hear, or feel a pressure wave at 10.36 this morning? Something like a sonic boom or a distant explosion, or perhaps a short earth tremor?
I was out sweeping snow, when I sensed (felt in my ears, and through the ground) a low-frequency boom. It shook my steel double-garage door, but finished within a second or less. However it disturbed the birds. Some pheasants were making alarm calls for a minute or so. (And it was much heavier than a shotgun being fired.)”

By 4caster