HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) References Citation Map 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 Arvidsson, R. Articles by Ekström, G. Search for Related Content GeoRef GeoRef Citation

Global CMT analysis of moderate earthquakes, M_w 4.5, using intermediate-period surface waves

Department of Earth and Planetary Sciences Harvard University, Cambridge, Massachusetts 02138

Abstract

A new method for calculating centroid moment tensor (CMT) solutions for moderate-sized earthquakes is presented and tested. In the new algorithm, which is a modification to the standard Harvard CMT method, intermediate-period surface waves are included in the inversion for source parameters. The dispersion of teleseismic surface waves in the period range 40 to 150 sec is predicted by interpolation of recent global phase velocity maps. The method is tested on a set of 20 moderate and large (5.2 M_w 7.2) earthquakes with known mechanisms. The retrieved mechanisms are similar to the previous results, even when noise is added to the seismograms to simulate earthquakes of a smaller magnitude (M_w 4.5). The inversion algorithm is applied to the 1993 Klamath Falls mainshock and aftershock sequence, and the results compare well with earlier results. A catalog of M_w 4.5 focal mechanisms for Greece and surrounding areas for the first six months of 1995 is derived using the new method of analysis.

Footnotes

^* Present address: Seismological Department, Uppsala University, Box 2101, S-750 02 Uppsala, Sweden.

This article has been cited by other articles:

				G. Ekstrom and R. W. Busby Measurements of Seismometer Orientation at USArray Transportable Array and Backbone Stations Seismological Research Letters, July 1, 2008; 79(4): 554 - 561. [Full Text] [PDF]

				E. R. Engdahl, A. Villasenor, H. R. DeShon, and C. H. Thurber Teleseismic Relocation and Assessment of Seismicity (1918-2005) in the Region of the 2004 Mw 9.0 Sumatra-Andaman and 2005 Mw 8.6 Nias Island Great Earthquakes Bulletin of the Seismological Society of America, January 1, 2007; 97(1A): S43 - S61. [Abstract] [Full Text] [PDF]

				G. Ekstrom, M. Nettles, and G. A. Abers Glacial Earthquakes Science, October 24, 2003; 302(5645): 622 - 624. [Abstract] [Full Text] [PDF]