The strange sounds phenomenon is notable for three reasons: 1, it is a genuine mystery; 2, it has produced exceptional venom among people watching the videos; 3, there are an amazing number of hoaxes. Why so many people would be hoaxing thse sounds is anybody's guess. This is just another example of the dozens of fakes that have appeared. This is an overdub of the Colorado sound of August 22, 2011, this time set in Mexico. The Colorado sounds are not in dispute, and preceeded an earthquake. Earth sounds taking place prior to quakes are not unknown, but are unusual.