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Officials at the Darke County EMA have identified what caused loud, explosion-type sounds that shook homes early Thursday morning.

The EMA said it has investigated reports from Central Indiana to Western Ohio about the sounds. They said they have worked with several agencies and departments and have determined that the loud sounds were caused by a phenomena called Cryoseism, also known as Frost Quakes.

Temperatures plunged below zero in the early-morning hours and the booms may have been caused by rapid differential expansion of warm buildings on the inside and very cold air on the outside.

Tonya Westfall, Arcanum resident said, "It was just a huge pop like something burst. It sounded like something in the attic and on the roof like an explosion or something fell or broke. It just scared me and then I'm laying there for a minute thinking, is the roof caving in?"

Residents wrote on Darke County Sheriff's office facebook page, describing what they felt.

Darke County Emergency management agency said a Frost Quake is usually caused by a sudden drop in temperatures when they are below zero and when snow or ice is on the ground. The moisture gets into the ground and as the ground freezes the water in the soil expands causing pressure to build and shake..

"Typically they only occur across the northern great lakes and into Canada," said Brandon Redmond, Darke County Sheriff's office.