Article (Scientific journals)
Ongoing automated ground deformation monitoring of Domuyo - Laguna del Maule area (Argentina) using Sentinel-1 MSBAS time series: Methodology description and first observations for the period 2015–2020
De Rauw, Dominique; d'Oreye, Nicolas; Jaspard, Maxime et al.
2020In Journal of South American Earth Sciences
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Keywords :
InSAR time series; Domuyo; Laguna del Maule; MSBAS; Displacement monitoring
Abstract :
[en] Synthetic Aperture Radar (SAR) Differential Interferometry (DInSAR) and its extensions to manage time series are nowadays well-known and mastered techniques to perform among others land-motion monitoring. We present here a fully automated monitoring service based on DInSAR and Multidimensional Small Baseline Subset (MSBAS) methods. The automated processing chain named “InSAR automated Mass processing Toolbox for multidimensional Time series” (MasTer) is demonstrated with the peculiar case of the Laguna del Maule and Domuyo volcanoes, which are known to undergo significant inflation up to several cm or tens of cm per year. The here-described monitoring service is made of three components: an InSAR command line processor, the MSBAS processor and a number of shell scripts automatizing all tasks, from data downloading to updated displacement maps and time series. Thanks to the European Commission Copernicus Service, data are freely available every 12 or 6 days along each orbit, depending on ESA acquisition plan. Linear deformation rate maps and time series of vertical and East-West ground deformation computed by the MasTer tool are updated every 1–6 days on a web page, according to the S1 data availability. Interested user can request additional time series at coherent pixels that wouldn’t be displayed on the web page and receive them by e-mail within a minute. Processing chain and preliminary observations at Domuyo and Laguna del Maule test site are presented and commented. The nearly 6 years long 2D time series of ground deformation allow highlighting recent changes in the well-known deformation at both volcanoes: Domuyo inflation stabilizes since beginning of 2019 while deformation at Laguna del Maule seems to gently accelerate since mid 2018. New deformation features are also identified, such as a 2 km wide 3 cm/yr circular subsidence at Laguna del Maule as well as a 2 cm/yr downward and 1 cm/yr eastward movement located to the East of Laguna Fea.
Disciplines :
Earth sciences & physical geography
Author, co-author :
De Rauw, Dominique  ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
d'Oreye, Nicolas;  European Centre of Geodynamics and Seismology
Jaspard, Maxime;  European Centre of Geodynamics and Seismology
Caselli, Alberto;  Laboratorio de Estudio y Seguimiento de Volcanes Activos (LESVA), IIPG - Universidad Nacional de Rio Negro – CONICET
Samsonov, Sergey;  Canada Centre for Mapping and Earth Observation, Natural Resources Canada (NRCAN)
Language :
English
Title :
Ongoing automated ground deformation monitoring of Domuyo - Laguna del Maule area (Argentina) using Sentinel-1 MSBAS time series: Methodology description and first observations for the period 2015–2020
Publication date :
September 2020
Journal title :
Journal of South American Earth Sciences
ISSN :
0895-9811
eISSN :
1873-0647
Publisher :
Elsevier
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 February 2021

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