Transformations of the bottom pressure variations, generated by marine infragravity waves into displacements of the upper layer of the earth’s crust. Quantitative assessment

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Abstract

A quantitative assessment of the transformation of the bottom pressure variations, generated by infragravity waves into displacements of the upper layer of the Earth's crust has been made on the basis of experimental data, obtained with a laser meter of hydrosphere pressure variations and two laser strainmeters. The dependence of the coefficient of transformation of bottom pressure into elastic vibrations of the Earth's crust on the periods of infragravity waves was determined.

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About the authors

G. I. Dolgikh

V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Author for correspondence.
Email: ss_budrin@mail.ru

Academician of the RAS

Russian Federation, Vladivostok

S. S. Budrin

V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: ss_budrin@mail.ru

Academician of the RAS

Russian Federation, Vladivostok

S. G. Dolgikh

V.I. Il’ichev Pacific Oceanological Institute, Far Eastern Branch of the Russian Academy of Sciences

Email: ss_budrin@mail.ru

Academician of the RAS

Russian Federation, Vladivostok

References

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2. Fig. 1. Spectrogram of the arrival of the main group of swell waves and the spectrum of infragravity waves recorded by the LIVDG (a) and spectrograms of microseisms of the second kind and spectra of microseisms of the first kind caused by swell waves and infragravity waves obtained from the horizontal components of the laser strainmeter “North–South 1”, “North–South 2” (b, c).

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3. Fig. 2. Spectrogram of the recording of infragravity waves obtained with LIVDG (a) and spectra constructed from the data sections selected on the spectrogram (b)

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4. Fig. 3. (a) Variations in the amplitudes of bottom pressure and displacements of the upper crustal layer and (b) graphs of variations in the transfer coefficient (the ratio of the magnitude of displacements to the magnitude of bottom pressure) for three ranges of periods corresponding to the periods of the recorded infragravity waves.

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5. Fig. 4. Dependence of the transfer coefficient on the period of infragravity waves for different time intervals.

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