Co-eruptive subsidence and post-eruptive uplift associated with the 2011–2012 eruption of Puyehue-Cordón Caulle, Chile, revealed by DInSAR

Renewed Posteruptive Uplift Following the 2011–2012 Rhyolitic Eruption of Cordón Caulle (Southern Andes, Chile): Evidence for Transient Episodes of Magma Reservoir Recharge During 2012–2018

“…These data sets were processed with standard algorithms described in detail in the supporting information (Agram et al, ; Chen and Zebker, ; Delgado et al, ; Farr et al, ; Fattahi et al, ; Fattahi and Amelung, ; Finnegan et al, ; Goldstein and Werner, ; Lopez‐Quiroz et al, ; Prats‐Iraola et al, ; Remy et al, ; Rosen et al, ; Samsonov, ; Sansosti et al, ; Yague‐Martinez et al, ; Zebker et al, ).. The differential interferograms calculated for every satellite orbit show ∼12 cm of uplift between June 2016 and February 2017 (Figures c to i), with a mean velocity of ∼23 cm/year (Figure ), in agreement with an independent ALOS‐2 ScanSAR time series (Euillades et al, ). This rate is intermediate between ∼45 cm/year during 2012–2013 (Delgado et al, ) and ∼16–17 cm/year during 2013–2015 (Figure ).…”

“…The CSK and S1 descending and the ALOS-2 and RS2 time series do not show clear unambiguous uplift signals after February 2017; thus, we interpret this to mean that the 2016-2017 inflation event ended during February 2017. The spatial footprint of the 2016-2017 inflation is very similar to that of the 2012-2015 event ( Figure 1) and different from those of the preeruptive and coeruptive deformation signals (Euillades et al, 2017;Jay et al, 2014;Wendt et al, 2017). The InSAR and GPS time series indicate an additional pulse of ∼5 cm/year of inflation between May 2017 and May 2018 ( Figure 2), although more data are required to thoroughly confirm this.…”

“…This study is divided in two parts. In the first one, we present a 6-year COSMO-SkyMED InSAR time series updated from a previous study (Delgado et al, 2016), as well as new RADARSAT-2, Sentinel-1, and ALOS-2 observations that span (Euillades et al, 2017), but here we use an independent analysis with a much larger data set. This uplift pulse was produced by the same reservoir that was active during 2012-2015, albeit at a reduced inflation rate.…”

Thermal, Deformation, and Degassing Remote Sensing Time Series (CE 2000–2017) at the 47 most Active Volcanoes in Latin America: Implications for Volcanic Systems

“…For example, a subtle and temporally limited increase in thermal output was measured by ASTER before the 18 April 2006 eruption at Láscar (Figure ), where ASTER data were acquired 12 days before eruption. Similarly, at Cordón Caulle (Figure ) a possible subtle increase in inflation rate associated with seismicity potentially caused by a transient magma injection leading to the 4 June 2011 eruption as measured in Envisat IS‐6 data acquired 27 days before eruption by Jay et al () (although see Euillades et al, ). In each of these cases, multiple data points were available shortly before the eruption, providing enough data to establish a change in the trend of the observed pre‐eruptive parameters.…”

Accuracy verification and evaluation of Sentinel-1A repeat track differential interferometric synthetic aperture radar in monitoring mining subsidence

“…[1][2][3] In early development stages, it became an effective tool to monitor the deformation caused by crustal motions, such as earthquakes and volcanoes. [4][5][6][7][8] DInSAR technology can be used to detect surface subsidence at centimeter level or even millimeter level and has widely been used in the field of subsidence monitoring and post-treatment in mining areas. 9 For example, for surface subsidence DInSAR-monitoring in the Appin, Westcliff, and Tower coal mines in the UK, the results achieved an accuracy of AE1 cm; ground subsidence caused by groundwater extraction and mining activities in the Ayntaio coal mine in Greece have also successfully been detected by this technology; and further, combined with leveling, the dynamic law of surface in mining areas was explored.…”