Persistent scatterer interferometric synthetic aperture radar for crustal deformation analysis, with application to Volcán Alcedo, Galápagos

Hooper, Andrew; Segall, P.; Zebker, H. A.

doi:10.1029/2006jb004763

Cited by 951 publications

(763 citation statements)

References 28 publications

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“…Nevertheless, with the currently available data, we cannot explain with certainty the large differences in the segment from kilometer 10-13 and from kilometer 24-26. On the other hand there is a well-agreed segment of kilometer 14-16 and another segment with relatively small differences from kilometer [16][17][18][19][20][21][22]. Further work such as seismic slip inversion could provide independent validation of our result.…”

Section: Comparison Of Slip Distribution With Field Datasupporting

confidence: 57%

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Coseismic and Postseismic Displacement of 2011 Mw 6.8 Tarlay Earthquake, Myanmar using InSAR Techniques and Inversion Analysis

Phodee

Trisirisatayawong

Aobpaet³

2015

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Abstract. In this study, we investigate the March 24 th , 2011 Mw=6.8 Tarlay earthquake, Myanmar using InSAR and inversion analysis. We firstly invert InSAR coseismic displacement from our previous study. The inversions for fault parameters are carried out in both Single and Multi-patch model. The coseismic slip of 2.5 meters from Single-patch solution is then combined with long-term slip rate from geomorphological study, resulting in an estimate of 1,040-4,160 years recurrence period. Then, coulomb stress changes on nearby faults in northern Thailand are calculated. It is found that stress in western and middle segments of Mae Chan fault decreases significantly while stress increase in eastern segment of Mae Chan, Mae Ing and Chiang Kham fault. Finally, the results from PSInSAR of 29 Radarsat-2 images reveal postseismic displacement rates between -24.4 to 34.5 millimeters per year.

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Section: Comparison Of Slip Distribution With Field Datasupporting

confidence: 57%

“…Rational and details of each processing steps of this technique can be found in [22]. Acquisition date and baseline information of the images, acquired from June, 2011 till May, 2013 in ascending orbit covering the Mae Chan fault and Nam Ma fault area, are shown in Table 3.…”

Section: Time-series Insar For Postseismic Deformation Detectionmentioning

confidence: 99%

Coseismic and Postseismic Displacement of 2011 Mw 6.8 Tarlay Earthquake, Myanmar using InSAR Techniques and Inversion Analysis

Phodee

Trisirisatayawong

Aobpaet³

2015

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“…For each track, the raw SAR data are converted into complex images (SLC) using the same Doppler centroid. A single master image is selected, based on both temporal and spatial baselines and on the difference of Doppler centroid in order to maximize the correlation between the images (Hooper et al 2007). After co-registration (i.e.…”

Section: Insarmentioning

confidence: 99%

Current deformation in Central Afar and triple junction kinematics deduced from GPS and InSAR measurements

Doubre¹,

Déprez²,

Masson³

et al. 2016

Geophys. J. Int.

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S U M M A R YKinematics of divergent boundaries and Rift-Rift-Rift junctions are classically studied using long-term geodetic observations. Since significant magma-related displacements are expected, short-term deformation provides important constraints on the crustal mechanisms involved both in active rifting and in transfer of extensional deformation between spreading axes. Using InSAR and GPS data, we analyse the surface deformation in the whole Central Afar region in detail, focusing on both the extensional deformation across the Quaternary magmato-tectonic rift segments, and on the zones of deformation transfer between active segments and spreading axes. The largest deformation occurs across the two recently activated Asal-Ghoubbet (AG) and Manda Hararo-Dabbahu (MH-D) magmato-tectonic segments with very high strain rates, whereas the other Quaternary active segments do not concentrate any large strain, suggesting that these rifts are either sealed during interdyking periods or not mature enough to remain a plate boundary. Outside of these segments, the GPS horizontal velocity field shows a regular gradient following a clockwise rotation of the displacements from the Southeast to the East of Afar, with respect to Nubia. Very few shallow creeping structures can be identified as well in the InSAR data. However, using these data together with the strain rate tensor and the rotations rates deduced from GPS baselines, the present-day strain field over Central Afar is consistent with the main tectonic structures, and therefore with the long-term deformation. We investigate the current kinematics of the triple junction included in our GPS data set by building simple block models. The deformation in Central Afar can be described by adding a central microblock evolving separately from the three surrounding plates. In this model, the northern block boundary corresponds to a deep EW-trending trans-tensional dislocation, locked from the surface to 10-13 km and joining at depth the active spreading axes of the Red Sea and the Aden Ridge, from AG to MH-D rift segments. Over the long-term, this plate configuration could explain the presence of the en-échelon magmatic basins and subrifts. However, the transient behaviour of the spreading axes implies that the deformation in Central Afar evolves depending on the availability of magma supply within the well-established segments.

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“…Quantification of the noise term is used to identify which scatterers are persistent [30]. Assuming spatial correlation of most of phase contributions over a specified distance, the spatial average of residual phase,φ int,x,k , is estimated using a spatial filtering as…”

Section: Temporal Coherence In Stampsmentioning

confidence: 99%

“…Temporal coherence, which is a measure of phase noise level and indicator of whether the pixel is a PS [30], [31], is defined as follows:…”

Section: Temporal Coherence In Stampsmentioning

confidence: 99%

A New Polarimetric Persistent Scatterer Interferometry Method Using Temporal Coherence Optimization

Sadeghi

Zoej

Hooper

et al. 2018

IEEE Trans. Geosci. Remote Sensing

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Abstract-While polarimetric persistent scatterer InSAR (PSI)is an effective technique for increasing the number and quality of selected PS pixels, existing methods are suboptimal; a polarimetric channel combination is selected for each pixel based either on amplitude, which works well only for high-amplitude scatterers such as man-made structures, or on the assumption that pixels in a surrounding window all have the same scattering mechanism. In this paper, we present a new polarimetric PSI method in which we use a phase-based criterion to select the optimal channel for each pixel, which can work well even in nonurban environments. This algorithm is based on polarimetric optimization of temporal coherence, as defined in the Stanford Method for PS (StaMPS), to identify the scatterers with stable phase characteristics. We form all possible copolar and crosspolar interferograms from the available polarimetric channels and find the optimum coefficients for each pixel using defined search spaces to optimize the temporal coherence. We apply our algorithm, PolStaMPS, to an area in the Tehran basin that is covered primarily by vegetation. Our results confirm that the algorithm substantially improves on StaMPS performance, increasing the number of PS pixels by 48%, 80%, and 82% with respect to HH+VV, VV, and HH channels, respectively, and increasing the signal-to-noise ratio of selected pixels.Index Terms-Polarimetric persistent scatterer InSAR (PSI), Stanford Method for PS (StaMPS), temporal coherence.

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Persistent scatterer interferometric synthetic aperture radar for crustal deformation analysis, with application to Volcán Alcedo, Galápagos

Cited by 951 publications

References 28 publications

Coseismic and Postseismic Displacement of 2011 Mw 6.8 Tarlay Earthquake, Myanmar using InSAR Techniques and Inversion Analysis

Coseismic and Postseismic Displacement of 2011 Mw 6.8 Tarlay Earthquake, Myanmar using InSAR Techniques and Inversion Analysis

Current deformation in Central Afar and triple junction kinematics deduced from GPS and InSAR measurements

A New Polarimetric Persistent Scatterer Interferometry Method Using Temporal Coherence Optimization

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