Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
Bulletin of the Seismological Society of America Signup for GSW Email News
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Bulletin of the Seismological Society of America; December 1975; v. 65; no. 6; p. 1787-1796
© 1975 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by CHOUDHURY, M. A.
Right arrow Articles by PERRIER, G.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Shear velocity from differential travel times of short-period ScS-P in New Hebrides, Fiji-Tonga, and Banda Sea regions

MANSUR A. CHOUDHURY*, GEORGES POUPINET{dagger} and GUY PERRIER{dagger}

LABORATOIRE D'ÉTUDE GÉOPHYSIQUE DES STRUCTURES PROFONDES, ASSOCIÉ AU CNRS, INSTITUT DE PHYSIQUE DU GLOBE, UNIVERSITÉ DE PARIS VI, 4 PLACE JUSSIEU, 75230 PARIS CEDEX 05, France

Abstract

Behavior of P, S and ScS residuals as well as those of differential travel times of ScS-P from the Jeffreys-Bullen tables are analyzed. The phases have been read from short-period records of the Antarctic station, Dumont d'Urville (DRV); the earthquakes originating in New Hebrides, Fiji-Tonga, and Banda Sea regions. P residuals from all regions show a mean value of about –1 sec. On the contrary, S and ScS residuals, well correlated among themselves, show important regional as well as focal-depth dependence. ScS-P residuals from shallow and intermediate shocks are largely positive for New Hebrides and largely negative for Banda Sea; those from intermediate shocks are moderately positive for Fiji-Tonga. The anomalies disappear at depths greater than about 200 km. Upper mantle shear velocity models are presented for the three regions. The models are discussed in relation to a sinking lithosphere.

Footnotes

* Present address: The Institut de Physique du Globe, Université Louis Pasteur, 5 rue René Descartes, 67084 Strasbourg Cedex.

{dagger} Present address: Laboratoire de Géophysique Interne, Université de Grenoble I, Domaine Universitaire, 38400 Saint-Martin-d'Hères.






JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Seismological Society of America