Forest Grove Sound

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The Forest Grove Sound was an unexplained noise, described by The Oregonian as a "mechanical scream", heard in Forest Grove, Oregon in February 2016.

In February 2016, a high pitched noise was heard at night in Forest Grove, Oregon. The Department of Forestry determined that their equipment was not the cause of the sound.[1] The noise was first shared with Dave Nemeyer by a Forest Grove resident, who posted a video of it on the city's Facebook page.[2] The Washington Post described the noise as sounding like a "giant flute played off pitch", car brakes, or a steam whistle.[3] NBC News described it as "akin to a bad one-note violin solo broadcast over a microphone with nonstop feedback".[4] It was described by The Oregonian as sounding like a "mechanical scream," and reportedly lasts from ten seconds to several minutes. The fire department of Forest Grove did not consider the sound to be a safety risk.[5] The noise occurred near Gales Creek Road. Neither the City of Forest Grove Public Works Department nor the Fire Department were able to explain the noise. According to NW Natural, there were no problems with gas lines in Forest Grove at the time.[6] In February 2016, Andrew Dawes, a professor of physics at Pacific University, mapped the locations where the noise had been heard, although the results were inconclusive and did not suggest any single location.[7][8]

Throughout February 2016, approximately 200 calls and were made to the Forest Grove Police Department, according to Captain Mike Herb, who said that most of the calls were suggesting explanations for the sound, ranging from frogs to aliens to Bigfoot. In late-February 2016, the Forest Grove police department announced via Facebook that the noise did not pose a safety hazard,[9] and the police announced they were halting their investigation until further information appeared. However, after February 2016, the noise was not heard. The final point was plotted on Dawes' map on February 27, 2016,[4] and the police and fire departments closed the case. Dave Nemeyer, the Forest Grove Fire Marshal, suspected the noise to be "a faulty attic fan or heat pump."[10][11]

In October 2016, a movie theatre in Forest Grove, Theatre in the Grove, created a haunted house, called "Aliens in the Grove", based on the Forest Grove noise.[12][13]


  1. ^ Cook, Katherine (25 February 2016). "Forest Grove Neighbors Mystified by Annoying Noise". KGW. Retrieved 5 January 2017.
  2. ^ Pelletiere, Nicole (17 February 2016). "Mysterious Shrieking Sound Frustrates Oregon Community". ABC News. Retrieved 2 March 2016.
  3. ^ Holley, Peter (21 February 2016). "Listen to the mysterious nocturnal noise baffling experts and terrifying an Oregon community". The Washington Post.
  4. ^ a b Fieldstadt, Elisha (28 May 2016). "Mystery of Forest Grove, Oregon, Noise May Never Be Solved". NBC News. Retrieved 22 January 2018.
  5. ^ Rose, Joseph (22 February 2016). "Why Forest Grove should be freaked out by mysterious nocturnal noise". The Oregonian. Retrieved 2 March 2017.
  6. ^ Weisberg, Brent (15 February 2016). "Mysterious Forest Grove noise puzzles neighbors". KOIN 6. Retrieved 5 January 2017.
  7. ^ Cook, Katherine (26 February 2016). "Professor mapping mysterious Forest Grove noise". KGW. Retrieved 5 January 2017.
  8. ^ Rose, Joseph (24 February 2016). "Forest Grove's creepy noise: Physicist tries to map mystery sound". The Oregonian. Retrieved 5 January 2017.
  9. ^ Campuzano, Eder (24 February 2016). "Forest Grove police address mystery noise on Facebook". The Oregonian. Retrieved 2 March 2017.
  10. ^ Rose, Joseph (31 March 2016). "Forest Grove's creepy noise: Authorities close case; no J.J. Abrams movie". The Oregonian. Retrieved 5 January 2017.
  11. ^ Pitawanich, Christine (25 February 2016). "Forest Grove Noise Spurs Flood of Calls, Emails to Authorities". KGW. Retrieved 5 January 2017.
  12. ^ Swindler, Samantha (23 October 2016). "Forest Grove Mystery Noise inspires this year's Haunted Theatre". The Oregonian.
  13. ^ Cook, Katherine (20 October 2016). "Mysterious Forest Grove noise becomes theater's Halloween theme". KGW. Retrieved 5 January 2017.