The Loudest Underwater Sound Ever Recorded Has No Scientific Explanation

Discussion in 'Chit Chat' started by ThunderThor, Oct 24, 2017.

  1. Starts at 5:03






    The Bloop mystery has been solved: it was never a giant sea monster

    IAN STEADMAN



    The Bloop was heard on hydrophones across the Pacific. It was a loud, ultra-low frequency sound that was heard at listening stations underwater over 5,000km apart, and one of many mysterious noises picked up by the National Oceanic and Atmospheric Administration (NOAA). Several articles in the years that followed popularised one suggestion that the Bloop might have been the sound of an unknown animal due to the "organic" nature of the noise, a theory that elevated the Bloop to the level of a great unsolved mystery.

    However, the NOAA is pretty sure that it wasn't an animal, but the sound of a relatively common event -- the cracking of an ice shelf as it breaks up from Antarctica. Several people have linked to the NOAA's website over the past week excitedly claiming that the mystery of the Bloop has been "solved", but as the information on the NOAA website was undated and without a source, Wired.co.uk spoke to NOAA and Oregon State University seismologist Robert Dziak by email to check it out. He confirmed that the Bloop really was just an icequake -- and it turns out that's kind of what they always thought it was. The theory of a giant animal making noises loud enough to be heard across the Pacific was more fantasy than science.

    Dziak explained to us the NOAA's findings, and confirmed that "the frequency and time-duration characteristics of the Bloop signal are consistent, and essentially identical, to icequake signals we have recorded off Antarctica". He explained: "We began an acoustic survey of the Bransfield Strait and Drake Passage in 2005 which lasted until 2010. It was in analysis of this recent acoustic data that it became clear that the sounds of ice breaking up and cracking is a dominant source of natural sound in the southern ocean. Each year there are tens of thousands of what we call 'icequakes' created by the cracking and melting of sea ice and ice calving off glaciers into the ocean, and these signals are very similar in character to the Bloop."

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    That makes it "extremely unlikely" that the sound is animal in origin, but he also pointed out that the hypothesis that the Bloop was caused by an animal wasn't ever really a serious one. He said: "What has led to a lot of the misperception of the animal origin sound of the Bloop is how the sound is played back. Typically, it is played at 16 times normal speed, which makes it sounds like an animal vocalisation of some sort. However, when the sound is played in real-time it has more of a 'quake' sound to it, similar to thunder." You can hear a recording of the Bloop in the video accompanying this story.

    There aren't even that many mysterious sounds picked up by the NOAA's hydrophones, according to Dziak: "Nearly all sounds can be attributed to major sound categories; geophysical (submarine volcanoes or earthquakes), weather (storms, waves, wind), anthropogenic (ships, airguns), ice (sea ice, iceberg groundings), and animals (cetaceans, fish)." Anything else is usually just some kind of electronic interference with the signal.

    It's easy to see why the Bloop was such a compelling mystery. The deep oceans are still mostly unexplored by humans (more than 95 percent, according to the NOAA), and only a few weeks ago an entirely new species of whale washed up on a beach in New Zealand. It was only in 2004 that the first video footage was recorded of a giant squid in the wild. To paraphrase Donald Rumsfeld, we know there's a lot we don't know about the deep ocean.
     
    Last edited: Oct 24, 2017
    bullmarket79 likes this.
  2. Overnight

    Overnight

    It's like in space, but underwater! Dude! All these sounds!

     

  3. MORE MORE MORE !
     
  4. Overnight

    Overnight

    Oh, you want more?!? Here's more!!! Uhura and the pointies!



    (Courtesy: Breaking Bad season 1 episode some number.)
     
  5. :D

    Release The Kraken !

     
  6. Strange Sounds and mysterious booms rattle Virginia, Illinois, New Jersey, UK and Australia
    By
    Strange Sounds
    -
    Sep 10, 2017

    Within the last few days, mystery booms and strange sounds were reported across wide portions of the US and the UK.
    Here a compilation of some of the latest unexplained events.
    The first video was captured in Norfolk, Virginia:



    Then on September 5, 2017, the sky started to ring like sirens:


    A mysterious explosion rattled homes in Garfield, New Jersey on September 8, 2017. The cause remains unknown.

    [​IMG]
    The mystery booms continue
    Houses were shaken by a still mysterious boom in UK. Witnesses report a loud noise as if something collapsing and hitting the ground or going boom. The mysterious bang was heard in Burslem, Tunstall, Sneyd Green, Middleport, Etruria, Ball Green, Chell and some parts of Hanley over more than 30 miles.


    The strange sounds from the sky continue.
    Finally a mysterious explosion shook homes at 10:49 PM in Moranbah, Australia on September 7, 2017. A sonic boom? A transformer explosion?

    With all these new strange sounds and unexplained booms, the mystery deepens.
     
  7. mlawson71

    mlawson71

    I've always been fascinated by articles like this. Where do these sounds come from? Unexplained geological or weather phenomena? Secret human experiments? Something else?