Physics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3520306f&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 20, CiteID L20306
Physics
1
Geodesy And Gravity: Non-Tectonic Deformation, Geodesy And Gravity: Satellite Geodesy: Results (6929, 7215, 7230, 7240), Volcanology: Volcano Monitoring (7280)
Scientific paper
In 2005 a repeat GPS campaign was conducted at 12 sites on Mt.Veniaminof Volcano and the surrounding region. A previous survey in 2002 provided initial locations for the sites. The deformation that occurred in the three years between the two surveys consist of ~2-4 cm of displacement caused by the northwest convergence of the Pacific and North America Plates and ~0.5-1 cm displacements caused by a deep intrusion that may be associated with eruptive activity in 2003-2005. The site velocities are corrected for compression using a pre-existing model for a locked subduction zone and the residuals modeled with volcanic sources in homogeneous and layered material. Although the data are fit equally well by several source models, we nevertheless gain important information about the deformation source. The best fitting models have depths that range from 3 to 17 km.
Fournier Thomas
Freymueller Jeff
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