Tweet with a location 
 
 You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more ||||| MADISON, Wis. - 
 
 The Wisconsin Air National Guard will be conducting training flights the rest of the week, according to an operations alert. 
 
 The 115th Fighter Wing of the Wisconsin Air National Guard will be conducting training flights at night Monday through Thursday, officials said. 
 
 Residents may see or hear F-16 fighter jets taking off or landing until about 10 p.m., according to the alert. 
 
 Training flights normally happen during the day, but pilots and maintenance personnel are required to conduct nighttime operations as a part of their readiness training, officials said. 
 
 Pilots will be following flight paths designed to minimize noise to area residents, according to the alert. ||||| Freezing temperatures Tuesday night might have caused something called a "frostquake" in southern Wisconsin, according to the National Weather Service in Sullivan. 
 
 Though frostquake is a geological rather than a meteorological term the boom felt in an area from about Columbus to Fox Lake and Johnson Creek to Oconomowoc prompted some people to call the weather service to report the event, meteorologist Justin Schultz said. 
 
 "It would sound like someone drove into your house, but as far as we know it didn't cause any damage," Schultz said. 
 
 Can confirm the frostquake. It shook the house here in Beaver Dam. @madisontraffic @NWSMKX — Bob Lesh (@Bob_Lesh) January 13, 2016 
 
 According to Schultz, the phenomenon occurs when water that drains into the ground freezes, expands and places stress on the surrounding ground. 
 
 "The fracturing of the soil and rock creates the frostquake," Schultz said of the seismic event that is actually called a cryoseism. 
 
 "This one was maybe a brief rumbling, but a very loud boom was the primary characteristic of this frostquake." 
 
 Frostquakes are relatively rare events, Schultz said, but not unheard of in Wisconsin. 
 
 "Of all the states that have reported cryoseisms, Wisconsin is among them," Schultz said.
– A weather event that a National Weather Service meteorologist says "[sounds] like someone drove into your house" likely took place in southern Wisconsin on Tuesday night, and it wasn't a tornado, lightning strike, or earthquake. Instead, it was what's called a "frostquake," the Milwaukee Journal Sentinel reports, a rare happening in the Badger State that takes place when water that seeps into the ground freezes and expands, fracturing the ground around it. Although no damage has been called in from the so-called cryoseism, that didn't stop the extreme-weather occurrence from frightening locals. "[Loud] boom and house rumbling at 8:30 here outside of Beaver Dam WI. Crazy. Kids were scared," one resident tweeted. One other possibility for those who heard noises: "[Booms] could have been from Air Force planes on exercise per media," tweeted NWS Milwaukee. (Meanwhile, here's what El Niño has in store for the rest of us this winter.)