Volcanic monitoring by remote sensing techniques allows to predict volcano behavior in large areas as the Andean Range between Argentina and Chile. Surface temperatures, digital elevation model for topographic and geomorphologic analysis, volcanic products mapping, estimation of SO 2 contents, drift velocity and altitude of volcanic plumes could be estimated using ASTER data. Brightness temperature was calculated by processing L1B (radiance at sensor) SWIR and TIR nighttime images from april 2000. Emissivity and absolute temperature images was obtained by processing L1A (raw data) TIR daytime data using Temperature and Emissivity Separation Algorithm. VNIR and SWIR bands was used for spectral classification (Spectral Angle Mapper) of volcanic products. TIR bands allows rock discrimination and qualitative analysis of SO 2 by using spectral ratios developed by the ASTER Science Team. At the end of the first stage of the project development, the brightness temperature of Lascar volcano, which has an exogenous dome, was calculated and some of it volcanic products were mapped. Also there were obtained absolute temperature and emissivity images of Putana, Láscar, Chiliques, Lastarria (Chile) and Copahue (Argentina) volcanoes. INTRODUCCIÓN ASTER es utilizado para monitoreo volcánico ya que permite realizar el mapeo de la temperatura de la superficie, generar modelos de elevación digital, mapeo de productos volcánicos, análisis topográfico y geológico, estimar contenido de SO2 y calcular la velocidad y altura de las plumas volcánicas. ASTER permite medir la temperatura en el rango de temperatura ambiente a 460°C y desde 670° a 910°C (Urai M. 2002). El comité científico de ASTER propuso un Plan de Monitoreo Volcánico global (Urai et al., 1999) y actualmente están siendo observados alrededor de 900 volcanes.