This video of loud creepy booms has been recordered on March 22, 2012 in Bethlehem, Pennsylvania.
People in comments say that the sounds are quite similar to those heard in Wisconsin earlier and some of them have been experienced those sounds in another states.
The author’s comments:
Grabbed my camera when some loud noises were being heard near Bethlehem PA
[…] more focussed on Betlehem Township, Pa: About 1 year ago, loud booms were recorded in the city. Here is the video […]