Recently I saw an article in the paper describing these frost quakes or cryoseisms in Toronto. They are set off by a sudden drop in temperature. So say it is above freezing during the day then drops dramatically below freezing at night for example. The water in the ground quickly freezes and causes the soil to expand with loud crackling noises, minor shaking and rattling. This couple experienced this at 2 am then at 7 am one day. This happens mostly in the winter of course.
I have never felt this, fortunately or unfortunately.
I have never felt this, fortunately or unfortunately.
