Dynamic deformation of Etna Volcano observed by satellite radar interferometry

Lanari, R.; Lundgren, P.; Sansosti, E.

doi:10.1029/98gl00642

Cited by 104 publications

(59 citation statements)

References 14 publications

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“…Centimeter-scale ground deformation attributed to magma movement, particularly in periods immediately preceding or following an eruption, is well established in a number of previous studies [1,4,[56][57][58][59]. At Augustine, however, magma source-related deformation has been subtle and at or below the detection level of geodetic systems for most of its recent history.…”

Section: Geophysical Considerations and Model Assumptionsmentioning

confidence: 88%

Pyroclastic Flow Deposits and InSAR: Analysis of Long-Term Subsidence at Augustine Volcano, Alaska

et al. 2016

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Deformation of pyroclastic flow deposits begins almost immediately after emplacement, and continues thereafter for months or years. This study analyzes the extent, volume, thickness, and variability in pyroclastic flow deposits (PFDs) on Augustine Volcano from measuring their deformation rates with interferometric synthetic aperture radar (InSAR). To conduct this analysis, we obtained 48 SAR images of Augustine Volcano acquired between 1992 and 2010, spanning its most recent eruption in 2006. The data were processed using d-InSAR time-series analysis to measure the thickness of the Augustine PFDs, as well as their surface deformation behavior. Because much of the 2006 PFDs overlie those from the previous eruption in 1986, geophysical models were derived to decompose deformation contributions from the 1986 deposits underlying the measured 2006 deposits. To accomplish this, we introduce an inversion approach to estimate geophysical parameters for both 1986 and 2006 PFDs. Our analyses estimate the expanded volume of pyroclastic flow material deposited during the 2006 eruption to be 3.3 × 10 7 m 3 ± 0.11 × 10 7 m 3 , and that PFDs in the northeastern part of Augustine Island reached a maximum thickness of~31 m with a mean of~5 m. Similarly, we estimate the expanded volume of PFDs from the 1986 eruption at 4.6 × 10 7 m 3 ± 0.62 × 10 7 m 3 , with a maximum thickness of~31 m, and a mean of~7 m.

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Section: Geophysical Considerations and Model Assumptionsmentioning

confidence: 88%

Pyroclastic Flow Deposits and InSAR: Analysis of Long-Term Subsidence at Augustine Volcano, Alaska

et al. 2016

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“…DInSAR has been successfully demonstrated in many applications, such as monitoring volcanic activity (Lanari et al 1998), determination of glacier movement (Goldstein et al 1993), measuring earthquake or seismic related deformation Ge et al 2009) and monitoring underground mining activity Ge et al 2007). But DInSAR results are limited by the decorrelation and atmospheric artefacts, thus restricting assessment of ground movement to a relatively short period.…”

Section: Introductionmentioning

confidence: 99%

Monitoring ground deformation in Beijing, China with persistent scatterer SAR interferometry

Liu

et al. 2011

J Geod

108

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This paper investigated the long term ground deformation in Beijing, China, using persistent/permanent scatterer interferometry (PSI) techniques. GEOS-PSI (Geodesy and Earth Observing Systems-PSI), an in-house software developed at UNSW for PSI, has been applied to 41 ENVI-SAT ASAR images acquired over the metropolitan area of Beijing ). The results generated using these datasets from the two satellites were cross-validated. Correlations between the results of ENVISAT ASAR and ALOS PALSAR agreed very well. The horizontal and vertical displacement rate maps over Beijing City were obtained from the results generated with data acquired by both satellites over the period from 1st February 2007 to 1st November 2008. The results indicate that the displacements in Beijing City were mainly in the vertical direction. The majority of the easting displacement rates were in the range of −10 mm/year to 10 mm/year, while the vertical rates were in the range of −115 mm/year to 6 mm/year. The possible cause for the ground deformation is groundwater extraction based on our research as well as earlier published studies.

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“…After this correction and by again using a simple Mogi source, they obviously find a deflation source at a shallower depth with respect to the one proposed by MASSONET et al (1995). LANARI et al (1998), by applying a grid search method of inversion and without performing any tropospheric correction, found that some interferograms of the considered period are fit well by a point source located at a 9 km depth. It has also been noted (CAYOL and CORNETTE, 1998;WADGE, 1998, 2000) that topography could play a role in the computation of the surface displacement for a given source and, therefore, should be accounted for in the deformation source modelling process; this was not considered in the previously cited works.…”

Section: Previous Deformation Models At Mt Etna For 1991-1993 Deflationmentioning

confidence: 99%

Comparison of Integrated Geodetic Data Models and Satellite Radar Interferograms to Infer Magma Storage During the 1991?1993 Mt. Etna Eruption

Bonaccorso

Sansosti

Berardino

2004

Pure and Applied Geophysics

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We compare the results obtained from the modelling of EDM, GPS, levelling and tilt data measured in the first part of the 1991-1993 eruption at Etna to the InSAR data acquired during the second part. The geodetic changes are very marked in the first half of the eruption and constrain a deflation source located at a few kilometers of depth (» 3 km b.s.l.), in agreement with other independent geophysical evidence. SAR data, available during the second part of the eruption, were analysed for different time intervals in the second part of the eruption. The interpretation of SAR interferograms reveals a large-scale but less marked deflation of the volcano that could be caused by a deeper source. This second source is in accord with a second deeper anomaly revealed by recent seismic investigations. The combination of geodetic data modelling and SAR images suggests a complex plumbing system composed at least of two possible storage regions located at different depths.

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Dynamic deformation of Etna Volcano observed by satellite radar interferometry

Cited by 104 publications

References 14 publications

Pyroclastic Flow Deposits and InSAR: Analysis of Long-Term Subsidence at Augustine Volcano, Alaska

Pyroclastic Flow Deposits and InSAR: Analysis of Long-Term Subsidence at Augustine Volcano, Alaska

Monitoring ground deformation in Beijing, China with persistent scatterer SAR interferometry

Comparison of Integrated Geodetic Data Models and Satellite Radar Interferograms to Infer Magma Storage During the 1991?1993 Mt. Etna Eruption

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