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A mysterious sonic boom was heard on October 31 that shook buildings and rattled windows in Seminole, Lake and West Volusia counties. Hundreds of calls were received by law enforcement and the media from people wanting to know what the strange booms were. A check with NASA showed that it was not the shuttle or any other space vehicle, the military claimed not to have any aircraft in the area, and the FAA had no answers. Central Florida news agencies scrambled to find out what caused the big noise but there were no answers. Perhaps authorities are looking up when they should be looking down. UNX researchers offer the theory that instead of this being a sonic boom, it may have been a sub-geologic anomoly created when the roof of the underground aquifer collapses with the aquifer acting as a huge echo chamber. This is a known event that has happened before and produced what people thought were earth tremors or sonic boom. In the current case, the boom was felt and heard along the course of the St. Johns River and along a range known for sinkholes. It is also an area in which there is a tremendous amount of water being pumped from underground chambers to satisfy the growing population. While this is just a theory, it is as good as any that the authorities have come up with and UNX feels that it needs to be considered.