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An investigation of mantle Rayleigh waves

Ewing, Maurice and Press, Frank (1954) An investigation of mantle Rayleigh waves. Bulletin of the Seismological Society of America, 44 (2A). pp. 127-147. ISSN 0037-1106. http://resolver.caltech.edu/CaltechAUTHORS:20140924-123829978

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Abstract

Dispersion of Rayleigh waves for a new range of periods ranging from 1 to 7 minutes is described. The group velocity curve shows a long-period and a short-period branch merging at a minimum value of 3.54 km/sec. with a corresponding period of about 225 sec. It is suggested that the known variation of velocity with depth in the mantle can account for the observed dispersion. The small scatter in the velocities and the absorption of these waves suggests that, unlike shorter-period surface waves, refraction and attenuation effects are negligible at the continental margins. From the absorption of mantle Rayleigh waves the internal friction in the upper mantle for periods of 140 and 215 sec. is found to be given by 1/Q = 670 × 10^(−5). This is of the same order as that reported from vibration measurements at audio frequencies on laboratory samples of crystalline rocks at normal pressure and temperature.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.bssaonline.org/content/44/2A/127.abstractPublisherArticle
Additional Information:© 1954 The Seismological Society of America. Manuscript received for publication October 20, 1952. This research has been supported by the Geophysics Research Division of the Air Force Cambridge Research Center under Contract AF 19(122)441.
Funders:
Funding AgencyGrant Number
Air Force Cambridge Research Center Geophysics Research DivisionAF 19(122)-441
Record Number:CaltechAUTHORS:20140924-123829978
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140924-123829978
Official Citation:Ewing, M., & Press, F. (1954). An investigation of mantle Rayleigh waves. Bulletin of the Seismological Society of America, 44(2A), 127-147.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49997
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:25 Sep 2014 18:17
Last Modified:13 Feb 2019 18:03

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