it gets weird(er)
Upsweep, Train, Julia, Slowdown, Bloop – the names of unexplained sounds are enough to send your imagination into overdrive. This amazing Wikipedia page lists six unexplained sounds around the world, including graphs of their soundwaves and recordings.
Bloop, for instance, was an ultra-low-frequency sound recorded in 1997. It was similar to a noise emitted by an animal, but much louder than the loudest recorded animal on earth, the blue whale. Some scientists suggest it might have been an ice quake, but nobody knows for sure.
Upsweep has been heard on hydrophones since 1991. It consists of upsweeping sounds, that appear seasonally, peaking in spring and autumn. It is gradually getting fainter, but can still be heard. No one has been able to identify the source.
|i was experimenting with book covers|
The Forest Grove Sound was an unexplained noise, described by The Oregonian as a "mechanical scream", heard in Forest Grove, Oregon in February 2016.
Throughout February 2016, approximately 200 calls 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, 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, 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."
In October 2016, a performing arts theatre in Forest Grove, Theatre in the Grove, created a haunted house, called "Aliens in the Grove", based on the Forest Grove noise.