Abstract
GEOPHYSICAL RESEARCH LETTERS,
VOL. 29,
1967,
4 PP., 2002
doi:10.1029/2002GL015883
Degree-1 Earth deformation from very long baseline interferometry measurements
Nevada Bureau of Mines and Geology, and Seismological Laboratory, University of Nevada, Reno, USA
Nevada Bureau of Mines and Geology, and Seismological Laboratory, University of Nevada, Reno, USA
The presence of degree-1 deformations in very long baseline interferometry (VLBI) measurements is detected for the first time. We compare VLBI measurements with the deformation field predicted using a GPS-determined load moment. Degree-1 series in the center of figure frame have root mean square values up to 3 and 1.5 mm in the up and horizontal components respectively. The predicted baseline series are compared with VLBI baseline series where there are >50 matching points. For the period 1996–2001, 14 baselines out of 35 are significantly correlated (5% significance level). For the period 1985–2001, a sinusoidal fit to the GPS load-moment series predicts baseline series at all VLBI epochs, 49 out of 110 baselines are significantly correlated (5% significance level). Comparison between annual signals estimated from the VLBI and predicted baseline series shows that degree-1 deformation most likely dominates the annual phase of the VLBI series.
Published 22 October 2002.
Citation: (2002), Degree-1 Earth deformation from very long baseline interferometry measurements, Geophys. Res. Lett., 29(20), 1967, doi:10.1029/2002GL015883.
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