Heard a loud boom recently? It might have been a frost quake

This was posted more than 12 months ago. The information may be outdated.

By Tom Spears, Ottawa Sun, December 29, 2017

Winter is upon us and the cold is here to last, with double-digit negative temperatures forecasted for the next week. Is there a bright side to any of this? Not really. But we offer the tiniest of silver linings! To accompany this cold snap, we’re running a short-term daily feature: Cold Facts. 

Long spells of deep cold bring frost quakes, or cryoseisms. Here’s how they work:

Water saturates the ground and then deep cold makes it freeze. The water expands as it freezes, and pressure builds up until finally a section of frozen earth near the surface cracks suddenly. Sometimes people feel the vibration. Often there’s a loud boom.