The coldest air of the season is set to slide over the Philadelphia area this weekend, which could lead to frost quakes, ice quakes and lake quakes.

Add Yahoo as a preferred source to see more of our stories on Google. If you hear a loud "boom" in central Illinois this week, it could be a frost quake, a weather phenomenon that happens when ...

Here in Washington and in many other places across the country, we've had a lot of snow over the past several days, and some areas also had a rare phenomenon known as frost quakes. Never heard of them ...

If you hear a loud "boom" in central Illinois this week, it could be a frost quake, a weather phenomenon that happens when temperatures plummet and groundwater freezes quickly. "Since water expands ...

If you hear a loud "boom" in the commonwealth this week, it could be a frost quake, a weather phenomenon that happens when temperatures plummet and groundwater freezes quickly. "Since water expands ...