After a mostly sleepless night (Jan 2-3, 2014) due to Frost Quakes, I thought i’d investigate more and find out if the USGS or the Natural Resources Canada to see if these seismic events actually made it onto any kind of an earthquake map.
It seems that a “Frost Quake” occurs when the ground is saturated at or near the freeze/thaw mark (0 degrees C), and then proceeds to freeze very deeply (as occured in the Greater Toronto Area). Last night we experienced temperatures dipping into the -25 Celcius range, which reached into the earth with a grip so strong that the expanding water-soaked ground had nowhere to go. So it blew a gasket so to speak!
According to the Natural Resources Canada Earthquake Map there were no quakes reported in the overnight period of between Jan 2 to Jan 3 2014.
I found some articles correlating what i had heard throughout the night:
Here’s a wiki article about Cryosesimic Events: http://en.wikipedia.org/wiki/Cryoseism