| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 U.S. Geological Survey
4200
University Drive
Anchorage, Alaska 99508
(P.J.H.)
2 U.S. Geological Survey, MS977
345
Middlefield Road
Menlo Park, California 94025
(D.P.S., T.E.D.,
H.D.S., J.J.L.)
3 U.S. Geological Survey
Department
of Earth and Space Sciences
Box 351310
University of
Washington
Seattle, Washington 98195
(B.S.)
4 Istituto Nazionale di Geofisica e
Vulcanologia
Sismologia e Tettonofisica
Via di Vigna Murata 605
00143
Roma, Italy
(F.R.C.)
5 State of Alaska
Department of
Natural Resources
Division of Geological and Geophysical Surveys
3354
College Road
Fairbanks, Alaska 99709
(P.A.C.)
6 U.S. Geological Survey,
MS966
P.O. Box 25046
Denver, Colorado 80225-0046
(A.J.C.,
S.F.P.)
The 3 November 2002 Denali fault, Alaska, earthquake resulted in 341 km of surface rupture on the Susitna Glacier, Denali, and Totschunda faults. The rupture proceeded from west to east and began with a 48-km-long break on the previously unknown Susitna Glacier thrust fault. Slip on this thrust averaged about 4 m (Crone et al., 2004). Next came the principal surface break, along 226 km of the Denali fault, with average right-lateral offsets of 4.5–5.1 m and a maximum offset of 8.8 m near its eastern end. The Denali fault trace is commonly left stepping and north side up. About 99 km of the fault ruptured through glacier ice, where the trace orientation was commonly influenced by local ice fabric. Finally, slip transferred southeastward onto the Totschunda fault and continued for another 66 km where dextral offsets average 1.6–1.8 m. The transition from the Denali fault to the Totschunda fault occurs over a complex 25-km-long transfer zone of right-slip and normal fault traces. Three methods of calculating average surface slip all yield a moment magnitude of Mw 7.8, in very good agreement with the seismologically determined magnitude of M 7.9. A comparison of strong-motion inversions for moment release with our slip distribution shows they have a similar pattern. The locations of the two largest pulses of moment release correlate with the locations of increasing steps in the average values of observed slip. This suggests that slip-distribution data can be used to infer moment release along other active fault traces.
Online Material: Descriptions and photographs of localities with offset measurements.
This article has been cited by other articles:
|
|
 |
|
  N. A. Ruppert Five Years after the 2002 Denali Fault Earthquake Sequence: A Regional Network Operator's Perspective Seismological Research Letters, May 1, 2008; 79(3): 424 - 425. [Full Text] [PDF]
|
|
|
|
 |
|
 T. F. Redfield, D. W. Scholl, P. G. Fitzgerald, and M. E. Beck Jr. Escape tectonics and the extrusion of Alaska: Past, present, and future Geology, November 1, 2007; 35(11): 1039 - 1042. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Guo, A. Lin, G. Sun, and J. Zheng Surface Ruptures Associated with the 1937 M 7.5 Tuosuo Lake and the 1963 M 7.0 Alake Lake Earthquakes and the Paleoseismicity along the Tuosuo Lake Segment of the Kunlun Fault, Northern Tibet Bulletin of the Seismological Society of America, April 1, 2007; 97(2): 474 - 496. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. G. Bufe Coulomb Stress Transfer and Tectonic Loading Preceding the 2002 Denali Fault Earthquake Bulletin of the Seismological Society of America, October 1, 2006; 96(5): 1662 - 1674. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Fukuyama and T. Mikumo Dynamic Rupture Propagation during the 1891 Nobi, Central Japan, Earthquake: A Possible Extension to the Branched Faults Bulletin of the Seismological Society of America, August 1, 2006; 96(4A): 1257 - 1266. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Guo, A. Lin, T. Maruyama, J. Zheng, and G. Sun New Constraints on Recent Large Earthquakes along the Xidatan Dongdatan Segment of the Kunlun Fault, Western China Bulletin of the Seismological Society of America, February 1, 2006; 96(1): 48 - 58. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. J. Crone, S. F. Personius, P. A. Craw, P. J. Haeussler, and L. A. Staft The Susitna Glacier Thrust Fault: Characteristics of Surface Ruptures on the Fault that Initiated the 2002 Denali Fault Earthquake Bulletin of the Seismological Society of America, December 1, 2004; 94(6B): S5 - S22. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Carver, G. Plafker, M. Metz, L. Cluff, B. Slemmons, E. Johnson, J. Roddick, and S. Sorensen Surface Rupture on the Denali Fault Interpreted from Tree Damage during the 1912 Delta River Mw 7.2-7.4 Earthquake: Implications for the 2002 Denali Fault Earthquake Slip Distribution Bulletin of the Seismological Society of America, December 1, 2004; 94(6B): S58 - S71. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. I. Doser Seismicity of the Denali-Totschunda Fault Zone in Central Alaska (1912-1988) and Its Relation to the 2002 Denali Fault Earthquake Sequence Bulletin of the Seismological Society of America, December 1, 2004; 94(6B): S132 - S144. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
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]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
