The 2019 Stromboli eruption: the space-borne and ground-based InSAR contribution

On 3 July 2019, Stromboli experienced a paroxysmal explosion without long-term precursors, as instead occurred before the last two effusive eruptions. In the following months, lava outpoured from a vent localized in the SW crater area, and sporadically from the NE one. On 28 August 2019, a new paroxysmal explosion occurred, followed by strong volcanic activity, culminating with a lava flow emitted from the SW-Central crater area. Subsequently, the eruptive activity decreased, although frequent instability phenomena linked to the growth of new cones on the edge of the crater terrace occurred. This contribution summarizes the measurements obtained through space-borne and ground-based InSAR sensors. The ground-based data allowed to detect pressurization of the summit area, as the instability of the newly emplaced material. The satellite data instead helped to identify the slope dynamics. The integration of the complementary systems strengthens the monitoring of both the eruptive activity and the instability phenomena.

This work is supported by the 2019-2021 Università di Firenze and Italian Civil Protection Department agreement, and by the 2019-2021 IREA-CNR and Italian Civil Protection Department agreement.