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The Earth’s ‘hum’ is driven by ocean waves over the continental shelves

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  • Spahr C. Webb

    (Lamont Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA)

Abstract

Music of the sphere The Earth is regularly emitting a low frequency 'hum' equivalent to the energy released from a magnitude 5.75 earthquake. Since its discovery the source of this 'noise' has been projected to be some combination of the interactions between the atmosphere, the oceans and solid Earth, but exactly what produces it has remained something of a mystery. Now Spahr Webb presents calculations that suggest that seismic energy generated by the interaction of ocean waves with the shallow continental shelves, rather than atmospheric turbulence, is the probable source of the hum.

Suggested Citation

  • Spahr C. Webb, 2007. "The Earth’s ‘hum’ is driven by ocean waves over the continental shelves," Nature, Nature, vol. 445(7129), pages 754-756, February.
    • Handle: RePEc:nat:nature:v:445:y:2007:i:7129:d:10.1038_nature05536
    DOI: 10.1038/nature05536
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