Earth is its own frontier of intrigue and unexplainable phenomena . From mysterious bloops to baffling transonic boom and dumbfound Harkat-ul-Mujahidin , our planet rings with unexplained sounds . Here are just a few that carry on to confound scientist .
1. Upsweep
Upsweep is an unidentified sound that ’s live at least since the Pacific Marine Environmental Laboratory begin memorialize SOSUS — an underwater sound surveillance system of rules with listening stations around the Earth — in 1991 . The strait “ consists of a long railroad train of narrow - isthmus upsweeping sound of several moment continuance each , ” the laboratory reports . The source location is unmanageable to key , but it ’s in the Pacific , around the halfway point between Australia and South America . Upsweep changes with the seasons , becoming tacky in spring and fall , though it is n’t absolved why . The run possibility is that it ’s related to volcanic activity .
2. The Whistle
The Whistle was commemorate on July 7 , 1997 , and only one hydrophone — the underwater microphones used by the National Oceanic and Atmospheric Administration ( NOAA)—picked it up . The location is nameless and limited information has made it difficult to hypothesize on the source .
3. Bloop
Bloop is the large kahuna in unexplained sounds . In 1997 ( a expectant year for auditory ocean mysteries ) , an exceedingly hefty , ultra - low - frequency strait was detected at various hearing station thousands of miles apart and decipher to somewhere west of the southern tip of South America . The sound only lasted about a minute and and was heard repeatedly over the summer , but not since . Bloop is loosely believed to be the strait of a massive icequake , but scientist have n’t totally decree out the possibility that the phone originated from something “ organic . ”
That ’s where thing get eerie . If an animal was the source of Bloop , it would have to be larger than a blue whale . The most fanciful of all hypothesis stems from the fact that Bloop ’s location is fairly tightlipped to author H.P. Lovecraft ’s fictitious deep-set city of R’lyeh , where the creature known as Cthulhu lie down “ dead but dreaming . ” Cthulhu can best be described as part man , Draco , and octopus , which seems as likely a root as any for the sea ’s greatest aural anomaly .
4. Julia
Julia was recorded on March 1 , 1999 , lasted for or so 15 seconds , and was loud enough to be hear by the intact Equatorial Pacific Ocean hydrophone array . An Antarctic iceberg run aground is the lead suspect for its source .
5. Slow Down
slacken Down was first recorded on May 19 , 1997 and is also credited to an iceberg running aground , though some multitude take a firm stand it might be a jumbo calamary . The auditory sensation , lasting about seven minute , gradually decreases in frequency , hence the name “ slow down . ” Like Upsweep , the audio has been heard periodically since it was initially detected .
6. The Hum
The Hum has been recorded on several function , mostly during the last 50 years or so . In these cases , there have been reports of a unforgiving and disturbing humbled - frequency humming noise that can only hear by a certain helping of the population . It ’s difficult to nail when instances of the Hum began , but it ’s been well - document since the 1970s , and since then , font have pop up all over the humankind — from Ontario , Canada to Taos , New Mexico to Bristol , England to Largs , Scotland and Auckland , New Zealand .
In most instances , the unnatural group only makes up around 2 percent of the population , but for those soul , the Hum is largely ineluctable and out of the question to track . Those stirred report never having hear noises before , and say the Hum is mostly take heed indoors and becomes tacky at night . It ’s also most common in rural and suburban domain and among hoi polloi between age 55 and 70 .
scientist have long investigate the cause of the drone , at times tracing it to industrial equipment emit particular frequencies . For the most part , though , the phone has leave the world altogether puzzled . The leaning of other possible perpetrator is long and widely - rank — wireless communication devices , power or gaseous state production line , electromagnetic radiation , radio waves , or Earth tremor are all suspects . Because the Hum appears and disappears and because the crusade may vary from case to case , the phenomenon still baffles researchers . At this point , a few thingsareclear : The Hum is real and likely a by-product of twenty-first - one C livelihood .
7. Skyquakes
Skyquakes , or unexplained transonic boom , have been pick up around the world for the last 200 eld or so , normally near bodies of pee . These headscratchers have been cover on the Ganges in India , the East Coast and inland Finger Lakes of the U.S. , near the North Sea , and in Australia , Japan , and Italy . The sound — which has been described as mime massive scag or cannon fire — has been chalk up to everything from meteoroid entering the atmosphere to gas escaping from outlet in the Earth ’s control surface ( or the gas explode after being entrap underwater as a result of biological decay ) to earthquakes , military aircraft , submerged caves collapsing , and even a possible by-product of solar and/or Earth - based magnetic activeness .
8. UVB-76
UVB-76 , also known as The Buzzer , has been showing up on shortwave radios for decades . It circulate at 4625 kHz and after repeated buzzing noises , a spokesperson once in a while read numbers and name in Russian . The source and purpose has never been determined .
9. 52-Hertz whale
This brute , also known as the loneliest hulk in the humans , calls at a highly unusual 52 Gustav Hertz , well above the normal relative frequency . Scientists have been listening to 52 - Heinrich Hertz for decades , and recently , filmmaker raised $ 400,000 on Kickstarter to seek the mammal out . It should be mention that the fundraiser reached its goal through the aid of Leonardo DiCaprio , another mysterious wildcat .
