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Coupling weather radar, infrasound and thermal camera for near real time tephra fall hazard assessment: Etna case studies

Authors

Mereu,  Luigi
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Marzano,  Frank Silvio
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Bonadonna,  Costanza
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Lacanna,  Giorgio
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ripepe,  Maurizio
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Scollo,  Simona
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Mereu, L., Marzano, F. S., Bonadonna, C., Lacanna, G., Ripepe, M., Scollo, S. (2023): Coupling weather radar, infrasound and thermal camera for near real time tephra fall hazard assessment: Etna case studies, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4483


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021911
Abstract
The explosive activities of Mt. Etna (Italy) typically implicate medium-high hazard correlated both to tephra fallout in the surrounding area which can damage buildings roofs, block road networks, etc., and to dispersion of finest volcanic particles in the atmosphere causing serious airway complications and health damages.This work intends to show the synergy between the weather radar integrated with the thermal camera and the infrasonic network system aimed at providing a near real time hazard assessment during the Etna explosive activities. We analyze several eruptions occurred between 2011 and 2021 at Etna and simultaneously observed by the thermal camera and infrasound systems dislocated around the summit eruptive craters, and by the weather radar, about 32 km far from the summit craters. We developed a new combined a methodology to quantify in near real-time tephra fall hazard. We define a paroxysmal early warning as notice time computed combining timing outputs from two different systems. Although each volcanic event is different in intensity, time duration and explosive characteristics, generally we derive a positive alert camming from coupling the infrasonic system with the weather radar and the thermal camera. This work represents an important step to mitigate the volcanic hazard related to tephra fallout and could show its potential if full implemented in near real-time monitoring during Etna eruptive activities.