Residents of Vashon Island in the Puget Sound of Washington State have been reporting a strange unidentified hum for years and no one seems to know what it is.
Scientists and the local utility company don’t know the cause.
Could it be connected to the June 1947 ‘Maury Island incident’, when Harold A. Dahl and his son saw several “doughnut-shaped objects” while on a boat off the shore of Maury Island, near Vashon Island? Dahl’s story is that one of the ships appeared to be flying erratically and possibly crashed into the Puget Sound near Vashon Island.
The hum is described as a very low persistent low-frequency pure tone that people have heard all across the Island.