In February of 2015, The Weather Channel featured a story on possible cryoseisms being reported in parts of Tennessee.
From their website:
Dispatchers in Tennessee have been handling many reports of loud boom-like noises that some people thought were either gunshots, fireworks, exploding gas lines or even trees cracking.
According to Brandi Smith, Spring Hill’s 911 director, firefighters and EMTs were sent to an apartment complex after a number of tenants reported hearing the scary sounds.
An expert with the National Weather Service speculated that more cryoseisms were being reported in 2014 and 2015 due to record cold temperatures occurring during the winter months in parts of the United States.