Forecasting of thermal behavior of lava fountains with the synergic use of multi-sensor satellite data.

Infrared radiometers on-board of geostationary and polar satellites orbiting around the Earth are increasingly used to measure radiance from high-temperature volcanic features, whose released energetic content is quantified by the volcanic radiative power (VRP). Geostationary satellite sensors offer high temporal resolution capabilities with which it is possible to characterize the fast-changing dynamics of short and rapid eruptive phenomena, like lava fountains. Under this perspective, they allow to get accurate temporal information of the monitored volcanic phenomena, such as the exponential decay factor of a lava fountain cooling curve. On contrast, polar satellite sensors offer mid-high spatial resolution with which it is possible to spatially characterize eruptive phenomena and to retrieve accurate spatial information such as the areal extent of the volcanic thermal anomaly. In this work, we forecast the thermal behaviour of the long sequence of lava fountains occurred at Mt. Etna on 2021 by combining the temporal features provided by geostationary satellite sensors and the spatial features provided by polar satellite sensors, in order to get more accurate VRP estimates.