FAIRMONT - A loud boom heard Sunday afternoon throughout Fairmont was an engine backfiring at the power plant on North Main Street.
According to officials with the Fairmont Police Department, at about 4:45 p.m. Sunday, Southern Minnesota Muncipal Power Association started up one of its new engines at the plant. The engine backfired, causing the loud explosion. However, the backfire caused only minor damage within the plant, and no one was injured.
Local residents on social media sites reported hearing the explosion as far away as Imogene.The extremely cold temperatures likely contributed to the amplified and far-reaching sound effects of the backfire, as extreme cold traps sound waves near the ground, and allows them to travel much farther than usual.