Everyone's house was most likely "popping" overnight, but what was that loud boom I heard? Well, it's a cryoseism...and it's really not that uncommon when temperatures get this cold. So, what's a "cryoseism?"
(From Wikipedia) - A cryoseism, also known as an ice quake or a frost quake, is a seismic event that may be caused by a sudden cracking action in frozen soil or rock saturated with water or ice . As water drains into the ground, it may eventually freeze and expand under colder temperatures, putting stress on its surroundings. This stress builds up until relieved explosively in the form of a cryoseism. Now you know...