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Static stress transfer during the 2002 Nenana Mountain-Denali Fault, Alaska, earthquake sequence

Geophysical Research Letters

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Abstract

On 23 October 2002, the Mw 6.7 Nenana Mountain earthquake occurred in central Alaska. It was followed on 3 November 2002 by the Mw 7.9 Denali Fault mainshock, the largest strike-slip earthquake to occur in North America during the past 150 years. We have modeled static Coulomb stress transfer effects during this sequence. We find that the Nenana Mountain foreshock transferred 30-50 kPa of Coulomb stress to the hypocentral region of the Denali Fault mainshock, encouraging its occurrence. We also find that the two main earthquakes together transferred more than 400 kPa of Coulomb stress to the Cross Creek segment of the Totschunda fault system and to the Denali fault southeast of the mainshock rupture, and up to 80 kPa to the Denali fault west of the Nenana Mountain rupture. Other major faults in the region experienced much smaller static Coulomb stress changes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Static stress transfer during the 2002 Nenana Mountain-Denali Fault, Alaska, earthquake sequence
Series title:
Geophysical Research Letters
Volume
30
Issue:
6
Year Published:
2003
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters
First page:
43
Last page:
1
Number of Pages:
-41