Bulletin of the Seismological Society of America
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Bulletin of the Seismological Society of America; December 1991; v. 81; no. 6; p. 2310-2319
© 1991 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by MA, K.-F.
Right arrow Articles by KANAMORI, H.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Aftershock sequence of the 3 December 1988 Pasadena earthquake

KUO-FONG MA and HIROO KANAMORI

SEISMOLOGICAL LABORATORY 252-21 CALIFORNIA INSTITUTE OF TECHNOLOGY, PASADENA, CALIFORNIA 91125

Abstract

The Pasadena earthquake (ML = 4.9) of 3 December 1988 occurred at a depth of 16 km, probably on the Santa Monica - Raymond fault, which is recognized as one of the most important faults in the Los Angeles basin for its potential seismic hazard. Prior to this event, no earthquake larger than magnitude 4 had been recorded since 1930 in this area. High-quality seismograms were recorded with the Pasadena very broadband (VBB) system (IRIS-TERRAscope station) not only for the mainshock but also for the aftershocks at epicentral distances of 3 to 4 km. We determined the focal mechanisms of 9 aftershocks using these data; for most of the aftershocks, the first-motion data are too sparse to determine the mechanism. We combined the first-motion data and the waveform data of P, SV, and SH waves recorded with the VBB instrument to determine the mechanism and seismic moment of nine aftershocks. The average orientations of the P and T axes of the aftershocks are consistent with the strike of the Raymond fault. The ratio of the logarithm of cumulative seismic moment of aftershocks to that of the seismic moment of the mainshock is significantly smaller than commonly observed.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
K.-F. Ma and H. Kanamori
Broadband waveform observation of the 28 June 1991 Sierra Madre earthquake sequence (ML = 5.8)
Bulletin of the Seismological Society of America, December 1, 1994; 84(6): 1725 - 1738.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
S. C. Harmsen
The Little Skull Mountain, Nevada, earthquake of 29 June 1992: Aftershock focal mechanisms and tectonic stress field implications
Bulletin of the Seismological Society of America, October 1, 1994; 84(5): 1484 - 1505.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
E. Hauksson
The 1991 Sierra Madre earthquake sequence in southern California: Seismological and tectonic analysis
Bulletin of the Seismological Society of America, August 1, 1994; 84(4): 1058 - 1074.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
B. B. WOODS, S. KEDAR, and D. V. HELMBERGER
ML:M0 as a regional seismic discriminant
Bulletin of the Seismological Society of America, August 1, 1993; 83(4): 1167 - 1183.
[Abstract] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1991 by the Seismological Society of America.