MINOR-ARC AND MAJOR-ARC GLOBAL SURFACE WAVE DIFFRACTION TOMOGRAPHY

We discuss extending global surface wave diffraction tomography to accommodate major-arc dispersion measurements. The introduction of major-arc surface wave dispersion measurements improves path density and resolution in regions poorly covered by minor-arc measurements alone, as occurs in much of th...

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Bibliographic Details
Main Authors: Anatoli L. Levshin, Michael P. Barmin, Michael H. Ritzwoller, Jeannot Trampert
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Surface waves
Tomography
Phase velocity
Di raction
Antarctic
Antarc*
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.399.8714
http://ciei.colorado.edu/geophysics/pubs/mhrpubs/pubs/2004/10_orig.pdf
Description
Summary:We discuss extending global surface wave diffraction tomography to accommodate major-arc dispersion measurements. The introduction of major-arc surface wave dispersion measurements improves path density and resolution in regions poorly covered by minor-arc measurements alone, as occurs in much of the southern hemisphere. The addition of major-arc measurements to the inversion for dispersion maps does not appreciably degrade the t to the minor-arc measurements but significantly improves the t to the major-arc measurements. For these reasons, we conclude that the addition of major-arc measurements is worthwhile in the interim until the broad-band network of ocean bottom or Antarctic stations is improved in the future.

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