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Multi-interferogram method for measuring interseismic deformation: Denali Fault, Alaska

Geophysical Journal International

By:
, , , and
DOI: 10.1111/j.1365-246X.2007.03415.x

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Abstract

Studies of interseismic strain accumulation are crucial to our understanding of continental deformation, the earthquake cycle and seismic hazard. By mapping small amounts of ground deformation over large spatial areas, InSAR has the potential to produce continental-scale maps of strain accumulation on active faults. However, most InSAR studies to date have focused on areas where the coherence is relatively good (e.g. California, Tibet and Turkey) and most analysis techniques (stacking, small baseline subset algorithm, permanent scatterers, etc.) only include information from pixels which are coherent throughout the time-span of the study. In some areas, such as Alaska, where the deformation rate is small and coherence very variable, it is necessary to include information from pixels which are coherent in some but not all interferograms. We use a three-stage iterative algorithm based on distributed scatterer interferometry. We validate our method using synthetic data created using realistic parameters from a test site on the Denali Fault, Alaska, and present a preliminary result of 10.5 ?? 5.0 mm yr-1 for the slip rate on the Denali Fault based on a single track of radar data from ERS1/2. ?? 2007 The Authors Journal compilation ?? 2007 RAS.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Multi-interferogram method for measuring interseismic deformation: Denali Fault, Alaska
Series title:
Geophysical Journal International
DOI:
10.1111/j.1365-246X.2007.03415.x
Volume
170
Issue:
3
Year Published:
2007
Language:
English
Publisher:
Oxford Journals
Contributing office(s):
Earth Resources Observation and Science (EROS) Center (Geography)
Description:
15 p.
Larger Work Title:
Geophysical Journal International
First page:
1165
Last page:
1179
Country:
United States
State:
Alaska
Other Geospatial:
Denali Fault
Online Only (Y/N):
N
Additional Online Files(Y/N):
N