Physics
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3314302h&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 14, CiteID L14302
Physics
7
Geodesy And Gravity: Transient Deformation (6924, 7230, 7240), Geodesy And Gravity: Space Geodetic Surveys, Tectonophysics: Continental Neotectonics (8002)
Scientific paper
Data from BARGEN GPS stations around Yucca Mountain (YM) have been independently processed using GIPSY-OASIS and GAMIT/GLOBK. The RMS velocity differences between these solutions is 0.06 mm/yr (east component) and 0.10 mm/yr (north), indicating an ability to resolve tectonic signals >0.3 mm/yr with high confidence. Inversion of GPS station velocities for Eastern California Shear Zone (ECSZ) fault parameters produces an unreasonably deep locking depth of ~30 km for the Death Valley-Furnace Creek fault system, contradicting seismological evidence. The GPS cluster locally west of YM observes a strain rate of 17.0 +/- 1.8 ns/yr, marginally higher than our ECSZ model predicts (13.9 +/- 0.7 ns/yr). Significantly, the cluster to the east observes 22.3 +/- 2.1 ns/yr, which is 6.2σ higher than the model (8.6 +/- 0.7 ns/yr), suggesting that additional sources of strain more local to YM (<30 km) are currently active, collectively accumulating >0.7 mm/yr.
Blewitt Geoffrey
Hill Emma M.
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