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Preface to the Issue Dedicated to the 2002 Denali Fault Earthquake Sequence

¹ Los Alamos National Laboratory
EES-11, MS D-408
Los Alamos, New Mexico 87545
char@lanl.gov
 (C.R.)

² Geophysical Insitute
University of Alaska
Fairbanks, Alaska 99775
doug@giseis.alaska.edu
 (D.C.)

³ Carver Geologic, Inc.
P.O. Box 52
12021 Middlebay Drive
Kodiak, Alaska 99615
cgeol@alaska.com
 (G.C.)

The first 300 words of the full text of this article appear below.

On 3 November 2002, a M_w 7.9 earthquake, the largest continental strike-slip earthquake in North America since the 1857 Fort Tejon, California, event, occurred in central Alaska. The earthquake began with reverse faulting on a 40-km extent of the previously unknown Susitna Glacier fault, but rupture transferred eastward to the right-lateral Denali fault and continued for over 200 km, finally transferring to rupture 70 km of the Totschunda fault. This large, complex event we term the Denali fault earthquake (DFE), after the major crustal fault that carried most of the displacement. The initiation of the rupture, the Susitna Glacier fault, is in a remote region of central Alaska that under normal circumstances is sparsely instrumented. On 23 October of that year, however, a large earthquake of M_w 6.7, referred to as the Nenana Mountain earthquake (NME), occurred only 22 km to the west of the DFE epicenter. The NME, in hindsight recognized as a foreshock to the DFE, prompted deployment of a temporary network by the Alaska Earthquake Information Center (AEIC). Hence, the area was under significantly enhanced seismic surveillance at the time of the DFE, 10 days later, which was further augmented by the addition of 19 more stations following the DFE mainshock. As a result, high-quality data were available in the near field, providing enhanced coverage for aftershock activity from the Susitna Glacier fault initiation point, along the Denali fault as far as the western portion of the Totschunda fault, to augment regional and teleseismic data for this sequence.

As the rupture proceeded eastward, the Richardson Highway, one of the two north–south roads connecting the central and southern parts of the state, was disrupted where it crosses the Denali fault trace. Also significantly displaced was the Trans-Alaska Pipeline, operated . . . [Full Text of this Article]

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