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PCAIM joint inversion of InSAR and ground‐based geodetic time series: Application to monitoring magmatic inflation beneath the Long Valley Caldera
Author(s) -
Lin Yunung Nina,
Kositsky Andrew P.,
Avouac JeanPhilippe
Publication year - 2010
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2010gl045769
Subject(s) - geodetic datum , interferometric synthetic aperture radar , geology , caldera , geodesy , inversion (geology) , seismology , volcano , remote sensing , synthetic aperture radar , tectonics
This study demonstrates the interest of using a Principal Component Analysis‐based Inversion Method (PCAIM) to analyze jointly InSAR and ground‐based geodetic time series of crustal deformation. A major advantage of this approach is that the InSAR tropospheric biases are naturally filtered out provided they do not introduce correlated or high amplitude noise in the input times series. This approach yields source models which are well‐constrained both in time and space due to the temporal resolution of the ground‐based geodetic data and the spatial resolution of the InSAR data. The technique is computationally inexpensive allowing for the inversion of large datasets. To demonstrate the performance of this approach, we apply it to the 1997–98 magmatic inflation event in the Long Valley Caldera, California.