A mysterious boom that rattled homes in southern Indiana has been traced to the routine detonation of a live ordnance at the Jefferson Proving Ground.
Range commander Lt. Col. Ken Stone said Wednesday's extreme cold allowed the blast's shockwave to travel for several miles, creating a much larger shockwave than normally would occur.
Stone tells The Madison Courier that if the detonation had occurred in the summer the range likely would not "have gotten those phone calls."
Residents in the Jefferson County town of Canaan reported that Wednesday's boom rattled their homes' windows.
The more than 50,000-acre proving ground opened in 1941 as a U.S. Army training ground, but closed in 1995. It remains a training area for the Indiana Air National Guard and other agencies.
Information from: The Madison Courier
(Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.)