People were awoken again this morning (December 30th) by loud "Kaboom!" noises—similar to what many heard on Christmas Eve and Christmas Morning. Many were jolted from their sleep, and had to get up and look around the house. They reported their walls shook, and that it sounded like the roof was collapsing.

These are, apparently, Frost Quakes—aka Cyroseisms—that struck, rare, localized seismic events that occur when a sudden drop in temperature freezes the groundwater, which then expands and cracks the soil and rock.

Indeed, CP24.com reports "loud boom-like noises that rippled through parts of southern Ontario early Monday morning were likely caused by frost quakes, police say."

People in York Region, Kawartha Lakes and Peterborough heard multiple booms in the early morning hours.

The explosive expansion of air is similar to a thunderclap, says CP24 meteorologist Bill Coulter.

Email us here if you heard it, tweet us, and follow along at hashtag #FrostQuakes and #FrostQuake on Twitter.

Or just rock out to the below...

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Many people in Peterborough and surrounding areas reporting feeling a loud boom on Christmas morning—around 2 a.m in the Peterborough area. It was enough to jolt many from their sleep, get up and look around the house—and on the roof!

One explanation was that it was Santa landing, others wondered whether it was a meteor—but the most plausible explanation was that it was a cryoseism, also known as a "frost quake," according to Global News. Cyroseisms, Global reports, "are rare, localized seismic events that occur when a sudden drop in temperature freezes the groundwater, which then expands and cracks the soil and rock. The crack will release a sudden burst of explosive energy, resulting in a loud noise and shaking."

The boom was felt at different times—11 p.m. on Christmas Eve in Toronto, Newmarket, Aurora, Richmond Hill and Sutton, but around 2 a.m. in Peterborough, and at other times in other areas.

Comment below if you heard it.

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