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The 2010 slow slip event and secular motion at Kı̄lauea, Hawai‵i, inferred from TerraSAR‐X InSAR data
Author(s) -
Chen Jingyi,
Zebker Howard A.,
Segall Paul,
Miklius Asta
Publication year - 2014
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.983
H-Index - 232
eISSN - 2169-9356
pISSN - 2169-9313
DOI - 10.1002/2014jb011156
Subject(s) - interferometric synthetic aperture radar , geodesy , geology , gnss augmentation , slip (aerodynamics) , synthetic aperture radar , seismology , global positioning system , remote sensing , gnss applications , physics , computer science , telecommunications , thermodynamics
We present here a small baseline subset (SBAS) algorithm to extract both transient and secular ground deformations on the order of millimeters in the presence of tropospheric noise on the order of centimeters, when the transient is of short duration and known time and the background deformation is smooth in time. We applied this algorithm to study the 2010 slow slip event as well as the secular motion of Kı̄lauea's south flank using 49 TerraSAR‐X images. We also estimate the tropospheric delay variation relative to a given reference pixel using an interferometric synthetic aperture radar (InSAR) SBAS approach. We compare the InSAR SBAS solution for both ground deformation and tropospheric delays with existing GPS measurements and confirm that the ground deformation signal and tropospheric noise in InSAR data are successfully separated. We observe that the coastal region on the south side of the Hilina Pali moves at a higher background rate than the region north side of the Pali. We also conclude that the 2010 slow slip event (SSE) displacement is mainly horizontal and the maximum magnitude of the 2010 SSE vertical component is less than 5 mm.