|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
DEPARTMENT OF EARTH AND PLANETARY SCIENCES MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE, MASSACHUSETTS 02139
Abstract
The determination of focal depth and other source parameters by the use of first-motion data and surface-wave spectra is investigated. It is shown that the spectral ratio of Love to Rayleigh waves (L/R) is sensitive to all source parameters. The azimuthal variation of the L/R spectral ratios can be used to check the fault-plane solution as well as for focal depth determinations. Medium response, attenuation, and source finiteness seriously affect the absolute spectra and introduce uncertainty into the focal depth determinations. These effects are nearly canceled out when L/R amplitude ratios are used. Thus, the preferred procedure for source mechanism studies of shallow earthquakes is to use jointly the body-wave data, absolute spectra of surface waves, and the Love/Rayleigh spectral ratios. With this procedure, focal depths can be determined to an accuracy of a few kilometers.
Footnotes
* On leave of absence from the Mining Engineering Faculty, Technical University of Istanbul, Istanbul, Turkey.
This article has been cited by other articles:
|
|
 |
|
  E. E. Karagianni and C. B. Papazachos Shear velocity structure in the Aegean region obtained by joint inversion of Rayleigh and Love waves Geological Society, London, Special Publications, January 1, 2007; 291(1): 159 - 181. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 O. F. GURER, E. SANGU, and M. OZBURAN Neotectonics of the SW Marmara region, NW Anatolia, Turkey Geological Magazine, March 1, 2006; 143(2): 229 - 241. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 C. MENDOZA Source mechanisms of Colombia aftershocks using digital surface-wave data Bulletin of the Seismological Society of America, December 1, 1986; 76(6): 1597 - 1613. [Abstract] [PDF]
|
|
|
|
|
|
J.F. Dewey, M.R. Hempton, W.S.F. Kidd, F. Saroglu, and A.M.C. Sengor Shortening of continental lithosphere: the neotectonics of Eastern Anatolia -- a young collision zone Geological Society, London, Special Publications, January 1, 1986; 19(1): 1 - 36. [Abstract] [PDF]
|
|
|
|
|
|
G. B. PAVLIN and C. A. LANGSTON Source depth determination using multi-modal Rayleigh spectral ratios and linear discriminant analysis: A study of the reservoir-induced seismic sequence at Lake Kariba, Africa (September 1963 to August 1974) Bulletin of the Seismological Society of America, February 1, 1983; 73(1): 59 - 82. [Abstract] [PDF]
|
|
|
|
|
|
D. D. SINGH and H. K. GUPTA Source dynamics of two great earthquakes of the Indian subcontinent: The Bihar-Nepal earthquake of January 15, 1934 and the Quetta earthquake of May 30, 1935 Bulletin of the Seismological Society of America, June 1, 1980; 70(3): 757 - 773. [Abstract] [PDF]
|
|
|
|
 |
|
 A. M. C. Sengor The North Anatolian transform fault: its age, offset and tectonic significance Journal of the Geological Society, June 1, 1979; 136(3): 269 - 282. [Abstract] [PDF]
|
|
|
|
|
|
J. W. DEWEY Seismicity of Northern Anatolia Bulletin of the Seismological Society of America, June 1, 1976; 66(3): 843 - 868. [Abstract] [PDF]
|
|
|
|
|
|
B. J. MITCHELL Surface-wave attenuation and crustal anelasticity in Central North America Bulletin of the Seismological Society of America, June 1, 1973; 63(3): 1057 - 1071. [Abstract] [PDF]
|
|
|
|
|
|
R. P. MASSE, D. G. LAMBERT, and D. G. HARKRIDER Precision of the determination of focal depth from the spectral ratio of Love/Rayleigh surface waves Bulletin of the Seismological Society of America, February 1, 1973; 63(1): 59 - 100. [Abstract] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
