Mysterious noises rattling central Indiana neighborhoods were likely winter phenomenon

Dispatchers across central Indiana have been fielding frantic calls from residents who believe they’re hearing gunshots, exploding gas lines – or even secret underground activity – but it turns out what they’re most likely hearing is actually a loud winter phenomenon called “frost quakes.” Hoosiers from literally every part of the state have reported hearing the "booms" and "quakes" over the last couple of days.  The roller coaster temperatures that took central Indiana from a frozen tundra to a balmy spring and back below freezing again are likely to blame for the quakes which happen when the ground becomes saturated with water and then quickly freezes.