Volcanic Process Ground Deformation Using DInSAR Observations: The Case Study of the Sabancaya Volcano

Abstract. Remote sensing is one of the most useful tools when it comes to studying earth phenomena along large terrain extensions. Within this broad field, Differential Interferometric Synthetic Aperture Radar (DInSAR) has been evolving, and at this point is able to provide terrain deformation in millimetre-level precision. This analysis was conducted over the Sabancaya Volcano, in Perú, which is part of the Ampato-Sabancaya Volcanic Complex. This volcano has been active and continuously erupting since 2016, with various fault systems surrounding the volcanic complex. The main objective of this work was to map deformation caused by the volcanic system, processing Sentinel-1 products from 2016 and an interval that started in 2014 to 2017 to be able to study the effects of temporal decorrelation on interferometric products, being Sentinel-1 the first of the Copernicus Program satellite constellations conducted by the European Space Agency. The analysis showed deformation in the interval in which the eruption started and a deformation centre in the northern region of the volcanic complex, although the last one was found when studying a longer temporal baseline. Overall, the experiment shows that DInSAR is an effective tool to study volcanic systems.