F. Blume
UNAVCO
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Publication
Featured researches published by F. Blume.
Geology | 2012
Henry T. Berglund; Anne F. Sheehan; Mark H. Murray; Mousumi Roy; Anthony R. Lowry; R. Steven Nerem; F. Blume
We use continuous measurements of GPS sites from across the Rio Grande Rift, Great Plains, and Colorado Plateau to estimate present-day surface velocities and strain rates. Velocity gradients from five east-west profiles suggest an average of ∼1.2 nanostrains/yr east-west extensional strain rate across these three physiographic provinces. The extensional deformation is not concentrated in a narrow zone centered on the Rio Grande Rift but rather is distributed broadly from the western edge of the Colorado Plateau well into the western Great Plains. This unexpected pattern of broadly distributed deformation at the surface has important implications for our understanding of how low strain-rate deformation within continental interiors is accommodated.
Geophysical Research Letters | 2015
Henry T. Berglund; F. Blume; Andrea Prantner
We use a shake table capable of large (7 G) three-dimensional accelerations with large payloads to simulate ground motion reconstructed from acceleration data collected during the February 2010 Mw = 8.8 Maule, Chile, earthquake. The tracking performance of five modern geodetic GNSS receiver and antenna combinations was investigated while undergoing simulated seismic shaking at three two levels of amplification. Individual system performance was characterized by the number of tracked GNSS observations. The L1 and L2 GPS signal tracking was significantly impacted for the majority of the receiver models during simulations with maximum accelerations of 4 G, and the tracking performance for all of the tested receiver types was significantly impaired during the 7 G simulations. Results show improved tracking when only the antenna was shaken suggesting that vibration-induced oscillator phase noise may contribute significantly to tracking degradation during shaking.
Geophysical Research Letters | 2005
K. Wallace; Roger Bilham; F. Blume; V. K. Gaur; Vineet K. Gahalaut
Geophysical Research Letters | 2006
Kali Wallace; Roger Bilham; F. Blume; V. K. Gaur; Vineet K. Gahalaut
Journal of Geodesy | 2012
Matt A. King; Michael Bevis; T. J. Wilson; Bjorn Johns; F. Blume
Archive | 2002
Anne F. Sheehan; Francis T. Wu; Roger Bilham; F. Blume; Gaspar Monsalve; Rebecca Odessa Bendick; Hersh Joseph Gilbert; Thomas L. de La Torre; Charles K. Wilson; Jerry Y. C. Huang; Mehta R. S. Pandey; H.-L. Liu
Archive | 2002
Roger Bilham; Ken Wallace; V. K. Gaur; Rebecca Odessa Bendick; G. B. Kier; F. Blume
Geophysical Research Letters | 2015
Henry T. Berglund; F. Blume; Andrea Prantner
2014 AGU Fall Meeting | 2014
F. Blume
Archive | 2010
G. Z. Wang; F. Blume; Chuck Meertens; Pilar Ibanez; M. Schulze
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Cooperative Institute for Research in Environmental Sciences
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