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Higher mode surface waves and their bearing on the structure of the earth's mantle

Kovach, Robert L. and Anderson, Don L. (1964) Higher mode surface waves and their bearing on the structure of the earth's mantle. Bulletin of the Seismological Society of America, 54 (1). pp. 161-182. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140429-152446765

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Abstract

A detailed numerical investigation of surface wave dispersion and particle motion associated with the higher Love and Rayleigh modes over realistic earth models has been carried out as a preliminary to the routine use of these waves in studies of the crust-mantle system. The suggestion that the so-called channel waves, such as the Lg, Li, and Sa phases, can be interpreted by higher mode group velocity dispersion curves is verified in detail. Furthermore, Sa should have a higher velocity across shield areas than across normal continental areas and a higher velocity across continents than across oceans. Higher mode Rayleigh wave data are presented for long oceanic paths to Pasadena. The observed data favor the CIT 11 model of Anderson and Toksöz (1963) over the 8099 model of Dorman et al. (1960) and indicate that under the Pacific Ocean the low-velocity zone extends to a depth perhaps as deep as 400 km followed by an abrupt increase in shear velocity.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.bssaonline.org/content/54/1/161.abstractPublisherArticle
Additional Information:© 1964 Seismological Society of America. Manuscript received October 14, 1963. This research was supported by AF-AFOSR-25-63 of the Air Force Office of Scientific Research as part of the Advanced Research Projects Agency, project VELA.
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific ResearchAF-AFOSR-25-63
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological Sciences 1205
Issue or Number:1
Record Number:CaltechAUTHORS:20140429-152446765
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140429-152446765
Official Citation: Robert L. Kovach and Don L. Anderson Higher mode surface waves and their bearing on the structure of the earth's mantle Bulletin of the Seismological Society of America February 1964 54:161-182
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45327
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:29 Apr 2014 22:56
Last Modified:03 Oct 2019 06:29

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