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Earth's Constant Hum Explained

MattSparkes writes "It has been known for some time that there is a constant hum that emanates from the Earth, which can be heard near 10 millihertz on a seismometer. The problem was that nobody knew what caused it. It has now been shown that it is caused by waves on the bottom of the sea, and more specifically 'by the combination of two waves of the same frequency travelling in opposite directions.'"

2 of 336 comments (clear)

  1. Hmmmmmmmm by dcw3 · · Score: 4, Insightful

    Ok, so the waves are making the sound. Now tell us what causes the waves. I didn't notice a source in TFA.

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    Just another day in Paradise
    1. Re:Hmmmmmmmm by Dorceon · · Score: 3, Insightful

      Considering how litigation-happy that particular church is, you might have considered posting that anonymously.

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      What sound do people on rollercoasters make? Hint: it's not Xbox 360.