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Multiparametric experiment at Mt. Etna : investigation in both degassing and eruptive dynamics

In the framework of the MED-SUV project, a multi-parametric experiment to investigate degassing and, explosive and effusive dynamics was performed at Etna in July 2014. The experiment involved almost 40 researchers/technicians of different institutions from Italy, Germany and France : Istituto Nazionale di Geofisica e Vulcanologia (Osservatorio Etneo, Sezione di Roma, Sezione di Pisa, Sezione di Bologna, Sezione di Palermo), Ludwig Maximilian University (Munich), Technische Universität (Berlin), Université Blaise Pascal - Clermont-Ferrand II, Seconda Università di Napoli (Caserta), and CNR - Istituto Nazionale di Ottica (Firenze).

The instrumentation was deployed, during the first two days, near the eruptive fissure that opened at the base of Etna’s North-East Crater (NEC) in early-July 2014 (Fig. 1a). The fissure offered a unique opportunity to study the partitioning of energy and geophysical signals between degassing and explosive and effusive sources.

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Figure1 : Photographs of (a) eruptive activity at the two cinder cones that developed at the top of the eruptive fissure and (b) degassing from NEC as seen from the crater rim.

During the following days the instrumentation was set-up on the crater rim of NEC, with the aim of studying the crater degassing processes (Fig. 1b). Indeed, NEC is the main contributor to Etna’s gas release, and continuously generates infrasonic events resulting from its impulsive degassing regime.

The field campaign involved coupled deployment of seismometers, microphones, thermopiles, a mini-UV scanner, FTIR spectrometer, SO2 camera systems, high-frequency radiometric signals, high-speed video cameras, thermal and visible cameras, gravimeters, tiltmeters, laser HCl sensor, and satellite data (Fig. 2). Moreover, the experiment gave the opportunity to test the prototype of a DIAL for volcanic CO2 sensing the first time in a volcanic environment. The gathered information were integrated with data simultaneously recorded by the permanent networks run by Istituto Nazionale di Geofisica e Vulcanologia.

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Figure 2 : Photographs showing the deployment of the instrumentation during the multi-parametric experiment.

Preliminary analyses show a promising return that will help better understanding of the complex interplay between degassing and eruptive dynamics and of the mechanisms, and structure, of Etna’s upper feeding system.

Contact : Sciotto Mariangela, INGV-OE (sciotto[at]ct.ingv.it)

Authors : Eugenio Privitera(1), Daniele Andronico(1), Talfan Barnie(7), Alessandro Bonforte(1), Michael Burton(8), Tommaso Caltabiano(1), Andrea Cannata(1), Daniele Carbone(1), Francesco Ciancitto(1), Antonio Chiarugi(8), Danilo Contrafatto(1), Stefano Corradini(2), Francesco D’Amato(8), Elisabetta Del Bello(2), Franck Donnadieu(7), Ferruccio Ferrari(1), Juan José Pena Fernández(6), Filippo Greco(1), Andrew Harris(7), Ulrich Küppers(5), Alessandro La Spina(1), Philippe Labazuy(7), Marcello Liotta(3), Luigi Lodato(1), Antonio Paonita(4), Roberto Maugeri(1), Luca Merucci(2), Sevèrine Moune(7), Filippo Muré(1), Raphael Paris(7), Arianna Pesci(8), Manuel Queisser(8), Salvatore Rapisarda(1), Tullio Ricci(2), Giuseppe Salerno(1), Piergiorgio Scarlato(2), Mariangela Sciotto(1), Simona Scollo(1), Luciano Scuderi(1), Joern Sesterhenn(6), Letizia Spampinato(1), Laura Spina(5), Jacopo Taddeucci(2), Luciano Zuccarello(1).

(1)Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania - Osservatorio Etneo, Catania, Italy ; (2) Istituto Nazionale di Geofisica e Vulcanologia, Centro Nazionale Terremoti, Roma, Italy ; (3) Seconda Università di Napoli, Caserta, Italy ; (4) Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, Italy ; (5) Ludwig-Maximilians Universitat, Munich, Germany ; (6) Technische Universität, Berlin, Germany ; (7) Université Blaise Pascal - Clermont-Ferrand II, France ; (8) Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italy

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Last update : 11-07-2016