HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Full Text (PDF) 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 Doser, D. I. Search for Related Content GeoRef GeoRef Citation

Seismicity of the Denali-Totschunda Fault Zone in Central Alaska (1912–1988) and Its Relation to the 2002 Denali Fault Earthquake Sequence

¹ Department of Geological Sciences
University of Texas at El Paso
El Paso, Texas 79968-0555

I have relocated M 4.5 earthquakes occurring between 1912 and 1988 and smaller magnitude earthquakes occurring between 1971 and 1988, when seismograph stations within central Alaska began to increase, to examine changes in seismicity preceding the 2002 Denali fault earthquake sequence. I have also determined focal mechanisms from first-motion analysis and waveform modeling for many of the M 5.5 events. Limited phase and waveform information for the 1912 M_s 7.2 earthquake are consistent with rupture at shallow depth on a right-lateral strike-slip fault, although the limited data cannot distinguish between a range of possible mechanisms. Most other M 4.5 earthquakes occurring within the region prior to 1989 represent thrust/reverse faulting or strike-slip faulting adjacent to the Denali fault system. These results highlight the role thrust faulting plays in the deformation of the Denali region. Stress analysis shows continuity in the direction of maximum compressive stress (₁) between the western Denali fault zone and the Castle Mountain fault/Upper Cook Inlet region, suggesting the crust is behaving rigidly to transfer compression to the Denali fault zone and faults located to the north.

This article has been cited by other articles:

				N. A. Ratchkovski, S. Wiemer, and R. A. Hansen Seismotectonics of the Central Denali Fault, Alaska, and the 2002 Denali Fault Earthquake Sequence Bulletin of the Seismological Society of America, December 1, 2004; 94(6B): S156 - S174. [Abstract] [Full Text] [PDF]

				B. T. Aagaard, G. Anderson, and K. W. Hudnut Dynamic Rupture Modeling of the Transition from Thrust to Strike-Slip Motion in the 2002 Denali Fault Earthquake, Alaska Bulletin of the Seismological Society of America, December 1, 2004; 94(6B): S190 - S201. [Abstract] [Full Text] [PDF]