A theory of the origin of microseisms

@article{LonguetHiggins1950ATO,
  title={A theory of the origin of microseisms},
  author={Michael Selwyn Longuet-Higgins},
  journal={Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences},
  year={1950},
  volume={243},
  pages={1 - 35}
}
  • M. Longuet-Higgins
  • Published 27 September 1950
  • Geology
  • Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
In the past it has been considered unlikely that ocean waves are capable of generating microseismic oscillations of the sea bed over areas of deep water, since the decrease of the pressure variations with depth is exponential, according to the first-order theory generally used. However, it was recently shown by Miche that in the second approximation to the standing wave there is a second-order pressure variation which is not attenuated with depth and which must therefore ultimately predominate… 

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References

SHOWING 1-10 OF 16 REFERENCES

NOTES ON THE THEORY OF MICROSEISMS.

Introduction.-During the last few years much attention has been devoted to the theory of microseisms. In our opinion it has been demonstrated that these disturbances are earth waves proceeding from

On compressional waves in two superposed layers

  • H. Jeffreys
  • Geology
    Mathematical Proceedings of the Cambridge Philosophical Society
  • 1926
The assumption that the compressional waves of earthquakes follow the ordinary laws of refraction, the energy within any pencil of rays remaining permanently within that pencil, has been found to

Microseisms Associated with Disturbed Weather in the Indian Seas

Seismologists have often noted the appearance of pronounced microseisms in seismic records when the weather has been disturbed over a neighbouring sea. For instance, the late Dr. KLOTZ suggested a

On the propagation of tremors over the surface of an elastic solid

  • H. Lamb
  • Engineering
    Proceedings of the Royal Society of London
  • 1904
The paper treats of the propagation of vibrations over the surface of a “semi-infinite” isotropic elastic solid, i. e., a solid bounded only by a plane. For purposes of description, this plane may be

Relations between Sea Waves and Microseisms

ONE of the possibilities suggested by Admiralty research on waves and swell during the past two years is that of obtaining information about the wind and waves in a distant storm area by examining

Methods of Mathematical Physics

1. The real variable 2. Scalars and vectors 3. Tensors 4. Matrices 5. Multiple integrals 6. Potential theory 7. Operational methods 8. Physical applications of the operational method 9. Numerical

A theory of microseisms with geologic applications

A theory for the origin of microseisms based on the normal mode propagation of sound in two layers is given. It explains the mechanism of transmission of seismic energy from a storm at sea and