Geological applications of the PRISMA hyperspectral mission: Canary Islands scenario

1st Scientific-Technical Conference of the Geological and Mining Institute of Spain-National Center (IGME, CSIC) 134 Geological applications of the PRISMA hyperspectral mission. Canary Islands scenario J. Buzzi Marcos1,*, A. Riaza2 and I. Galindo-Jiménez 3 1UTE – PLANAGEO. Madrid, Spain 2IGME, CSIC. Madrid, Spain 3IGME, CSIC. Oficina de Proyectos Las Palmas de Gran Canaria, Spain *Corresp. Autor. C/Ríos Rosas 23, 28003 Madrid, Spain. [email protected] Abstract PRISMA is a technology demonstration and pre-operational mission of the Italian Space Agency. The space segment is an Earth observation satellite with medium resolution hyperspectral and panchromatic instrumentation, which allows the recognition of the geometrical characteristics of the scenes together with their spectral properties along the VNIR and SWIR ranges of the electromagnetic spectrum. This work explores the possibilities of this mission for the study of the eruptive episode that took place on La Palma (Canary Islands) between 19 September and 13 December 2021. The multi-temporal analysis of the PRISMA images allowed us to carry out analyses of changes in the active processes that take place during volcanic eruptions. Thus, the characteristic spectral features and their temporal variation of the different active elements that appear in this eruptive scenario have been explored, such as volcanic gases, the ash and pyroclast column, the ongoing lava flows and the new lava delta. It has been possible to determine the influence of the presence of volcanic ash in these contexts, as well as the variations occurring in the lava delta. The analysis of CO2 spectral features together with MODTRAN simulations also allows an estimation of the concentration and distribution of this gas.