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Mantle Rayleigh waves from the Kamchatka earthquake of November 4, 1952

Ewing, Maurice and Press, Frank (1954) Mantle Rayleigh waves from the Kamchatka earthquake of November 4, 1952. Bulletin of the Seismological Society of America, 44 (3). pp. 471-479. ISSN 0037-1106.

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Mantle Rayleigh waves from the Kamchatka earthquake of November 4, 1952, are analyzed. The new Palisades long-period vertical seismograph recorded orders R_6–R_(15), the corresponding paths involving up to seven complete passages around the earth. The dispersion data for periods below 400 sec. are in excellent agreement with earlier results and can be explained in terms of the known increase of shear velocity with depth in the mantle. Data for periods 400-480 sec. indicate a tendency for the group velocity curve to level off, suggesting that these long waves are influenced by a low or vanishing shear velocity in the core. Deduction of internal friction in the mantle from wave absorption gives a value 1/Q = 370 × 10^(−5) for periods 250-350 sec. This is a little over half the value reported earlier for periods 140-215 sec.

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Additional Information:© 1954 Seismological Society of America. Manuscript received for publication April 22, 1953. This research has been supported by the Geophysics Research Division of the Air Force Cambridge Research Center under Contract AF 19(122)441.
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Air Force Cambridge Research Center Geophysical Research DivisionAF 19(122) 441
Issue or Number:3
Record Number:CaltechAUTHORS:20141010-103135503
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50337
Deposited By: Tony Diaz
Deposited On:10 Oct 2014 18:39
Last Modified:03 Oct 2019 07:22

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