Hikers filmed these sounds on video recording ahead of the 5.7 quake in Colorado (largest one in this area in Forty years).August 22, 2011. The sounds were captured by 2 hikers earlier in the day before the Colorado Earthquake. Does this have any link to the Virginia earthquake and Comet Elenin alignments?
It sounds much like the weird noises from the Ukraine and Windsor Canada a few weeks prior, right?
A thread on this is here:
The Earth is Groaning - Unknown sound phenomena occurring 2011