Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
Bulletin of the Seismological Society of America Don't get GSW? Talk to your librarian.
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Bulletin of the Seismological Society of America; April 1985; v. 75; no. 2; p. 491-505
© 1985 Seismological Society of America
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
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
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by KRUGER-KNUEPFER, J. L.
Right arrow Articles by RICHARDSON, R. M.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Microseismicity of the Kaibab Plateau, northern Arizona, and its tectonic implications

JOYCE L. KRUGER-KNUEPFER*, MARC L. SBAR{dagger} and RANDALL M. RICHARDSON

DEPARTMENT OF GEOSCIENCES UNIVERSITY OF ARIZONA, TUCSON, ARIZONA 85721

Abstract

A microearthquake investigation of the Kaibab Plateau in northern Arizona revealed swarms of small to very small magnitude earthquakes. A 12-station network of portable seismographs recorded 296 events with magnitudes from –0.5 < ML < 2.5 during 6 weeks in the summer of 1981. Fifty-six of these events were large enough and close enough to the network to be recorded on four or more instruments. The microearthquakes ranged in depth from 5 to 20 km, and epicenters were spatially clustered near late Cenozoic surface faults. Hypocenters for the 56 located events, however, did not reveal individual faults. The compilation of T axes from these fault-plane solutions yields an average least principal horizontal stress direction of ENE-WSW. The inferred orientation of principal stresses found in this study indicates the Kaibab Plateau lies within a region of predominantly normal faulting which extends from central Arizona northward into southwestern Utah. Although data are sparse in the region surrounding the Kaibab Plateau, evidence for the location of a Basin-Range-Colorado Plateau stress boundary through the Kaibab Plateau is not supported by the results of this study.

Footnotes

* Present address: Snee Hall, Department of Geological Sciences, Cornell University, Ithaca, New York 14853.

{dagger} Present address: Sohio Petroleum, 1 Lincoln Center, Suite 1200, 5400 LBJ Freeway, Dallas, Texas 75240.




This article has been cited by other articles:


Home page
 Bulletin of the Seismological Society of AmericaHome page
D. S. Brumbaugh
Active Faulting and Seismicity in a Prefractured Terrane: Grand Canyon, Arizona
Bulletin of the Seismological Society of America, August 1, 2005; 95(4): 1561 - 1566.
[Abstract] [Full Text] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
T. Lay, J. Ritsema, C. J. Ammon, and T. Wallace
Rapid source-mechanism analysis of the April 29, 1993 cataract Creek (Mw = 5.3), northern Arizona earthquake
Bulletin of the Seismological Society of America, April 1, 1994; 84(2): 451 - 457.
[Abstract] [PDF]

Home page
 Bulletin of the Seismological Society of AmericaHome page
P. A. JOHNSON and M. L. SBAR
A microearthquake study of southwest Utah-northwest Arizona: Transition between the Basin and Range Province and Intermountain Seismic Belt
Bulletin of the Seismological Society of America, April 1, 1987; 77(2): 579 - 596.
[Abstract] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Seismological Society of America