long crack stretching cross the sidewalk

On a side note, it hit -27C at about 01:30 this morning… and the house did make some cracking noises.

More interestingly, an apparent frost quake or icequake hit the region around 19:00 EST Sunday…
reports on Twitter from Sydenham area and we too heard it in the Yarker area. I got another report at work from Eastend Kingston.
It was only about -13C at the time.
The sound was like that of a cat jumping down onto the floor upstairs… only the cats were in the same room as we were.

Wish we had a datestamped audio recorded running 🙂

From https://en.wikipedia.org/wiki/Cryoseism
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.