|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
GEOPHYSICS LABORATORY UNIVERSITY OF TORONTO, TORONTO, ONTARIO, Canada
Abstract
The Knopoff-deHoop representation theorem has been used to calculate the form of the body waves radiated from an elliptical fault. Rupture is assumed to initiate at one focus of the ellipse and then spread out radially on the fault plane. Two cases are considered: 1) constant slip everywhere on the fault surface and 2) a variable slip which approaches zero at the fault edge. The radiation is calculated for distances from the fault which are large compared to the fault dimensions. The body waves are described by the product of two factors, one of which is the familiar equivalent-force system radiation pattern. The other factor includes the time dependence of the signal; it does not depend upon the direction of slip. The body waves exhibit two stopping phases. The theory is used to estimate the fault dimensions associated with six deep-focus earthquakes studied by Kasahara. The estimated fault dimensions are about twice the dimensions of the focal sphere as found by Kasahara. Finally, the difference between the phase spectrums of shallow and deep-focus earthquake radiation observed by Kishimoto is shown to be related to a difference in shape of the two fault surfaces; shallow-focus earthquakes appear to be associated with elongated fault surfaces, whereas deep-focus earthquakes are associated with more circular fault surfaces.
This article has been cited by other articles:
|
|
 |
|
  Source Parameters and Rupture Velocities of Microearthquakes in Western Nagano, Japan, Determined Using Stopping Phases Bulletin of the Seismological Society of America, October 1, 2004; 94(5): 1762 - 1780.
|
|
|
|
|
|
J. J. McGuire Estimating Finite Source Properties of Small Earthquake Ruptures Bulletin of the Seismological Society of America, April 1, 2004; 94(2): 377 - 393. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. J. Bommer, N. A. Abrahamson, F. O. Strasser, A. Pecker, P.-Y. Bard, H. Bungum, F. Cotton, D. Fah, F. Sabetta, F. Scherbaum, et al. The Challenge of Defining Upper Bounds on Earthquake Ground Motions Seismological Research Letters, January 1, 2004; 75(1): 82 - 95. [Full Text] [PDF]
|
|
|
|
|
|
Seismic Radiation from a Unidirectional Asymmetrical Circular Crack Model, Part I: Constant Rupture Velocity Bulletin of the Seismological Society of America, April 1, 2002; 92(3): 945 - 961.
|
|
|
|
|
|
Asperity Model of an Earthquake: Static Problem Bulletin of the Seismological Society of America, March 1, 2002; 92(2): 672 - 686.
|
|
|
|
|
|
C. K. Saikia and D. V. Helmberger Approximation of rupture directivity in regional phases using upgoing and downgoing wave fields Bulletin of the Seismological Society of America, August 1, 1997; 87(4): 987 - 998. [Abstract] [PDF]
|
|
|
|
|
|
A. DOUGLAS and D. W. RIVERS An explosion that looks like an earthquake Bulletin of the Seismological Society of America, April 1, 1988; 78(2): 1011 - 1019. [PDF]
|
|
|
|
|
|
C. A. LANGSTON and M. FRANCO-SPERA Modeling of the Koyna, India, aftershock of 12 December 1967 Bulletin of the Seismological Society of America, June 1, 1985; 75(3): 651 - 660. [Abstract] [PDF]
|
|
|
|
|
|
A. Douglas, R. C. Stewart, and L. Richardson Comments on "Analysis of broadband seismograms from the Chile-Peru area" by R. Kind and D. Seidl Bulletin of the Seismological Society of America, April 1, 1984; 74(2): 773 - 777. [PDF]
|
|
|
|
|
|
T. C. HANKS Reply to "comments on 'the corner frequency shift, earthquake source models, and Q'" Bulletin of the Seismological Society of America, August 1, 1982; 72(4): 1433 - 1444. [PDF]
|
|
|
|
|
|
S. M. DAY Three-dimensional finite difference simulation of fault dynamics: Rectangular faults with fixed rupture velocity Bulletin of the Seismological Society of America, June 1, 1982; 72(3): 705 - 727. [Abstract] [PDF]
|
|
|
|
|
|
A. FRANKEL Source parameters and scaling relationships of small earthquakes in the northeastern Caribbean Bulletin of the Seismological Society of America, August 1, 1981; 71(4): 1173 - 1190. [Abstract] [PDF]
|
|
|
|
|
|
J. CIPAR Broadband time domain modeling of earthquakes from Friuli, Italy Bulletin of the Seismological Society of America, August 1, 1981; 71(4): 1215 - 1231. [Abstract] [PDF]
|
|
|
|
|
|
R. SLUNGA Earthquake source mechanism determination by use of body-wave amplitudes--An application to Swedish earthquakes Bulletin of the Seismological Society of America, February 1, 1981; 71(1): 25 - 35. [Abstract] [PDF]
|
|
|
|
|
|
J. CIPAR Teleseismic observations of the 1976 Friuli, Italy earthquake sequence Bulletin of the Seismological Society of America, August 1, 1980; 70(4): 963 - 983. [Abstract] [PDF]
|
|
|
|
|
|
G. E. MARION and L. T. LONG Microearthquake spectra in the southeastern United States Bulletin of the Seismological Society of America, August 1, 1980; 70(4): 1037 - 1054. [Abstract] [PDF]
|
|
|
|
|
|
Z. DER, E. SMART, and A. CHAPLIN Short-period S-wave attenuation under the United States Bulletin of the Seismological Society of America, February 1, 1980; 70(1): 101 - 125. [Abstract] [PDF]
|
|
|
|
|
|
R. SLUNGA Source mechanism of a Baltic earthquake inferred from surface-wave recordings Bulletin of the Seismological Society of America, December 1, 1979; 69(6): 1931 - 1964. [Abstract] [PDF]
|
|
|
|
|
|
W. H. BAKUN, R. M. STEWART, and C. G. BUFE Directivity in the high-frequency radiation of small earthquakes Bulletin of the Seismological Society of America, October 1, 1978; 68(5): 1253 - 1263. [Abstract] [PDF]
|
|
|
|
|
|
J. E. EBEL, L. J. BURDICK, and G. S. STEWART The source mechanism of the August 7, 1966 El Golfo earthquake Bulletin of the Seismological Society of America, October 1, 1978; 68(5): 1281 - 1292. [Abstract] [PDF]
|
|
|
|
|
|
L. J. BURDICK t* for S waves with a continental ray path Bulletin of the Seismological Society of America, August 1, 1978; 68(4): 1013 - 1030. [Abstract] [PDF]
|
|
|
|
|
|
R. J. ARCHULETA and G. A. FRAZIER Three-dimensional numerical simulations of dynamic faulting in a half-space Bulletin of the Seismological Society of America, June 1, 1978; 68(3): 541 - 572. [Abstract] [PDF]
|
|
|
|
|
|
D. M. BOORE and W. B. JOYNER The influence of rupture incoherence on seismic directivity Bulletin of the Seismological Society of America, April 1, 1978; 68(2): 283 - 300. [Abstract] [PDF]
|
|
|
|
|
|
C. A. LANGSTON The February 9, 1971 San Fernando earthquake: A study of source finiteness in teleseismic body waves Bulletin of the Seismological Society of America, February 1, 1978; 68(1): 1 - 29. [Abstract] [PDF]
|
|
|
|
|
|
R. JAMES BROWN Two-parameter scaling of source spectra: Love waves from deep-focus Bonin Islands earthquakes Bulletin of the Seismological Society of America, April 1, 1977; 67(2): 285 - 300. [Abstract] [PDF]
|
|
|
|
|
|
T. H. HEATON and D. V. HELMBERGER A study of the strong ground motion of the Borrego Mountain, California, earthquake Bulletin of the Seismological Society of America, April 1, 1977; 67(2): 315 - 330. [Abstract] [PDF]
|
|
|
|
|
|
P. G. SOMERVILLE, R. A. WIGGINS, and R. M. ELLIS Time-domain determination of earthquake fault parameters from short-period P-waves Bulletin of the Seismological Society of America, October 1, 1976; 66(5): 1459 - 1484. [Abstract] [PDF]
|
|
|
|
|
|
L. J. BURDICK and G. R. MELLMAN Inversion of the body waves from the Borrego Mountain earthquake to the source mechanism Bulletin of the Seismological Society of America, October 1, 1976; 66(5): 1485 - 1499. [Abstract] [PDF]
|
|
|
|
|
|
C. A. LANGSTON and R. BUTLER Focal mechanism of the August 1, 1975 Oroville earthquake Bulletin of the Seismological Society of America, August 1, 1976; 66(4): 1111 - 1120. [Abstract] [PDF]
|
|
|
|
|
|
M. D. TRIFUNAC Preliminary empirical model for scaling Fourier Amplitude Spectra of strong ground acceleration in terms of earthquake magnitude, source-to-station distance, and recording site conditions Bulletin of the Seismological Society of America, August 1, 1976; 66(4): 1343 - 1373. [Abstract] [PDF]
|
|
|
|
|
|
R. MADARIAGA Dynamics of an expanding circular fault Bulletin of the Seismological Society of America, June 1, 1976; 66(3): 639 - 666. [Abstract] [PDF]
|
|
|
|
|
|
D. M. BOORE and D. J. STIERMAN Source parameters of the Pt. Mugu, California, earthquake of February 21, 1973 Bulletin of the Seismological Society of America, April 1, 1976; 66(2): 385 - 404. [Abstract] [PDF]
|
|
|
|
|
|
N. A. LEVY and A. K. MAL Calculation of ground motion in a three-dimensional model of the 1966 Parkfield earthquake Bulletin of the Seismological Society of America, April 1, 1976; 66(2): 405 - 423. [Abstract] [PDF]
|
|
|
|
|
|
P. G. RICHARDS Dynamic motions near an earthquake fault a three-dimensional solution Bulletin of the Seismological Society of America, February 1, 1976; 66(1): 1 - 32. [Abstract] [PDF]
|
|
|
|
|
|
A. NIAZY An exact solution for a finite, two-dimensional moving dislocation in an elastic half-space with application to the San Fernando earthquake of 1971 Bulletin of the Seismological Society of America, December 1, 1975; 65(6): 1797 - 1826. [Abstract] [PDF]
|
|
|
|
|
|
H. KANAMORI and D. L. ANDERSON Theoretical basis of some empirical relations in seismology Bulletin of the Seismological Society of America, October 1, 1975; 65(5): 1073 - 1095. [Abstract] [PDF]
|
|
|
|
|
|
D. J. ANDREWS From antimoment to moment: Plane-strain models of earthquakes that stop Bulletin of the Seismological Society of America, February 1, 1975; 65(1): 163 - 182. [Abstract] [PDF]
|
|
|
|
|
|
J. C. SAVAGE Relation between P- and S-wave corner frequencies in the seismic spectrum Bulletin of the Seismological Society of America, December 1, 1974; 64(6): 1621 - 1627. [Abstract] [PDF]
|
|
|
|
|
|
J. ANDERSON A dislocation model for the Parkfield earthquake Bulletin of the Seismological Society of America, June 1, 1974; 64(3-1): 671 - 686. [Abstract] [PDF]
|
|
|
|
|
|
P. MOLNAR, B. E. TUCKER, and J. N. BRUNE Corner frequencies of P and S waves and models of earthquake sources Bulletin of the Seismological Society of America, December 1, 1973; 63(6-1): 2091 - 2104. [Abstract] [PDF]
|
|
|
|
|
|
J. N. BRUNE Earthquake modeling by stick-slip along precut surfaces in stressed foam rubber Bulletin of the Seismological Society of America, December 1, 1973; 63(6-1): 2105 - 2119. [Abstract] [PDF]
|
|
|
|
|
|
H. S. HASEGAWA Surface- and body-wave spectra of CANNIKIN and shallow Aleutian earthquakes Bulletin of the Seismological Society of America, August 1, 1973; 63(4): 1201 - 1225. [Abstract] [PDF]
|
|
|
|
|
|
P. B. SCHNABEL and H. BOLTON SEED Accelerations in rock for earthquakes in the western United States Bulletin of the Seismological Society of America, April 1, 1973; 63(2): 501 - 516. [Abstract] [PDF]
|
|
|
|
|
|
P. MOLNAR, K. H. JACOB, and K. MCCAMY Implications of Archambeau's earthquake source theory for slip on faults Bulletin of the Seismological Society of America, February 1, 1973; 63(1): 101 - 104. [Abstract] [PDF]
|
|
|
|
|
|
K. N. KHATTRI Determination of earthquake fault plane, fault area, and rupture velocity from the spectra of long period P waves and the amplitude of SH waves Bulletin of the Seismological Society of America, April 1, 1969; 59(2): 615 - 630. [Abstract] [PDF]
|
|
|
|
|
|
N. A. HASKELL Elastic displacements in the near-field of a propagating fault Bulletin of the Seismological Society of America, April 1, 1969; 59(2): 865 - 908. [Abstract] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
