National Radio Quiet Zone (NRQZ)

The National Radio Quiet Zone (NRQZ) is an area of land encompassing some 13,000 square miles (33,670 square kms) in the border regions of Virginia and West Virginia where the United States government's Federal Communications Commission (FCC) has imposed regulations that serve to limit all possible sources of harmful interference to the Green Bank Observatory in Green Bank, West Virginia, and United States Navy radio receiving facilities in Sugar Grove, West Virginia.