Temperature distribution analysis of July 2001 Mt. Etna eruption observed by the airborne hyperspectral sensor MIVIS

V. Lombardo, M. F. Buongiorno

Abstract


On 17th and 18th July 2001, several fractures opened on Mt. Etna southern flank generating different lava flows
spreading both in Valle del Bove and towards Nicolosi. On 29th July the image spectrometer MIVIS was flown
over Mt. Etna to acquire high-resolution images of the eruption. The MIVIS airborne campaign was planned simultaneously
with TERRA, EO-1 and Landsat 7 satellite acquisitions, in order to compare hyperspectral and
multispectral data referred to active lavas. This work focuses on the thermal mapping of lava flows, taking advantage
of MIVIS sensor high technical performances. The MIVIS high spatial resolution allows a detailed
analysis of the lava flow topographic distribution. Its 12 bit dynamic range consents an estimate of the temperature
even for the «hottest» pixels. The main target of this work is the evaluation of the energy flux by means of
remote-sensing techniques. Surface temperature analysis was performed on distinct lava flows using the dualband
technique. These quantities were compared with the integrated temperatures retrieved using the MIVIS
thermal infrared bands. The influence of topography was also considered in the flux calculation using a Digital
Elevation Model (DEM) of Mt. Etna.

Keywords


remote-sensing;volcano monitoring;thermal infrared;dual-band technique

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References


DOI: https://doi.org/10.4401/ag-3468
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X