Physics
Scientific paper
Mar 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3306312h&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 6, CiteID L06312
Physics
5
Geodesy And Gravity: Tectonic Deformation (6924), Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Tectonophysics: Continental Margins: Convergent
Scientific paper
We use interferometric synthetic aperture radar (InSAR) analysis in eastern Taiwan to study reverse creep on the Longitudinal Valley fault (LVF). A stack of the three highest-quality image pairs spanning 1997-2000 shows sharp range change offsets along the eastern side of the Longitudinal Valley, suggesting 11-35 mm/yr of surface creep between 23 and 23.4°N. No shallow slip was observed along the northern or southern ends of the valley, nor on mapped fault traces on the western edge of the valley. The width of the zone of deformation varied, suggesting distributed shear in shallow sediments above the creeping fault in some places. The InSAR results support the view that although surface creep is rapid in certain locations, significant portions of the LVF are locked and thus represent a substantial seismic hazard.
Bürgmann Roland
Hsu Leslie
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