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 SIPKIN, S. A. Search for Related Content GeoRef GeoRef Citation

Moment-tensor solutions for the 24 November 1987 Superstition Hills, California, earthquakes

U. S. GEOLOGICAL SURVEY, MS 967, BOX 25046DENVER FEDERAL CENTER, DENVER, COLORADO 80225

Abstract

The teleseismic long-period waveforms recorded by the Global Digital Seismograph Network from the two largest Superstition Hills earthquakes are inverted using an algorithm based on optimal filter theory. These solutions differ slightly from those published in the Preliminary Determination of Epicenters Monthly Listing because a somewhat different, improved data set was used in the inversions and a time-dependent moment-tensor algorithm was used to investigate the complexity of the main shock. The foreshock (origin time 01:54:14.5, m_b 5.7, M_s 6.2) had a scalar moment of 2.3 x 10²⁵ dyne-cm, a depth of 8 km, and a mechanism of strike 217°, dip 79°, rake 4°. The main shock (origin time 13:15:56.4, m_b 6.0, M_s 6.6) was a complex event, consisting of at least two subevents, with a combined scalar moment of 1.0 x 10²⁶ dyne-cm, a depth of 10 km, and a mechanism of strike 303°, dip 89°, rake –180°.

This article has been cited by other articles:

				San Andreas Fault Zone, California: M >=5.5 Earthquake History Bulletin of the Seismological Society of America, October 1, 2002; 92(7): 2555 - 2601.

				C. O. Sanders and C. O. Sanders Interaction of the San Jacinto and San Andreas Fault Zones, Southern California: Triggered Earthquake Migration and Coupled Recurrence Intervals Science, May 14, 1993; 260(5110): 973 - 976. [Abstract] [PDF]

				L. K. HUTTON and L. M. JONES Local magnitudes and apparent variations in seismicity rates in Southern California Bulletin of the Seismological Society of America, April 1, 1993; 83(2): 313 - 329. [Abstract] [PDF]

				J. MORI Estimates of velocity structure and source depth using multiple P waves from aftershocks of the 1987 Elmore Ranch and Superstition Hills, California, earthquakes Bulletin of the Seismological Society of America, April 1, 1991; 81(2): 508 - 523. [Abstract] [PDF]

				D. J. WALD, D. V. HELMBERGER, and S. H. HARTZELL Rupture process of the 1987 Superstition Hills earthquake from the inversion of strong-motion data Bulletin of the Seismological Society of America, October 1, 1990; 80(5): 1079 - 1098. [Abstract] [PDF]

				L. J. HWANG, H. MAGISTRALE, and H. KANAMORI Teleseismic source parameters and rupture characteristics of the 24 November 1987, Superstition Hills earthquake Bulletin of the Seismological Society of America, February 1, 1990; 80(1): 43 - 56. [Abstract] [PDF]

				T. C. HANKS and C. R. ALLEN The Elmore Ranch and Superstition Hills earthquakes of 24 November 1987: Introduction to the special issue Bulletin of the Seismological Society of America, April 1, 1989; 79(2): 231 - 238. [PDF]

				R. V. SHARP, K. E. BUDDING, J. BOATWRIGHT, M. J. ADER, M. G. BONILLA, M. M. CLARK, T. E. FUMAL, K. K. HARMS, J. J. LIENKAEMPER, D. M. MORTON, et al. Surface faulting along the Superstition Hills fault zone and nearby faults associated with the earthquakes of 24 November 1987 Bulletin of the Seismological Society of America, April 1, 1989; 79(2): 252 - 281. [Abstract] [PDF]

				D. C. AGNEW and F. K. WYATT The 1987 Superstition Hills earthquake sequence: Strains and tilts at Pinon Flat Observatory Bulletin of the Seismological Society of America, April 1, 1989; 79(2): 480 - 492. [Abstract] [PDF]

				A. FRANKEL and L. WENNERBERG Rupture process of the Ms 6.6 Superstition Hills, California, earthquake determined from strong-motion recordings: Application of tomographic source inversion Bulletin of the Seismological Society of America, April 1, 1989; 79(2): 515 - 541. [Abstract] [PDF]