Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by CHOUDHURY, M. A. Articles by PERRIER, G. Search for Related Content GeoRef 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 and GUY PERRIER

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.

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

This article has been cited by other articles:

				J. Suckale and G. Grunthal Probabilistic Seismic Hazard Model for Vanuatu Bulletin of the Seismological Society of America, August 1, 2009; 99(4): 2108 - 2126. [Abstract] [Full Text] [PDF]