M.F. Buongiorno (Istituto Nazionale di Geofisica, Via di Vigna Murata 605, Rome, Italy)

M.P. Bogliolo (Istituto Nazionale di Geofisica, Via di Vigna Murata 605, Rome, Italy)

S. Teggi (Osservatorio Geofisico dell'Universita' di Modena, Via Campi 213/A 41100 Modena, Italy)

S. Pugnaghi (Osservatorio Geofisico dell'Universita' di Modena, Via Campi 213/A 41100 Modena Modena, Italy)

The study of tropospheric volcanic plumes formed by the continuous degassing from summit craters could provide informations on the magma moviments in the volcanic conduit. To investigate the volcanic plume composition a direct sampling technique, although producing good results, requires a considerable logistical planning and in some cases personal risk. The SO2 molecula shows absorption features in U.V., thermal I.R. and microwave regions of the EMS, which could be investigated with remote sensing systems. The present study is based on a methodology developed on airborne remote sensed images acquired by the TIMS instrument (Airborne Thermal Infrared Multispectral Scanner images) over Mt. Etna. In 1994 the Italian CNR organized the first MIVIS (Multispectral Infrared and Visible Imaging Spectrometer) deployment in Sicily on a variety of test sites. We decided to test and improve the SO2 retrieval technique on the MIVIS data acquired on Etna by combinig the remote sensed images with accurate atmospheric and ground measurements.