Forecasting Etna eruptions by real-time observation of volcanic gas composition Aiuppa, Alessandro ; Moretti, Roberto ; Federico, Cinzia ; Giudice, Gaetano ; Gurrieri, Sergio ; Liuzzo, Marco ; Papale, Paolo ; Shinohara, Hiroshi ; Valenza, Mariano Abstract Publication: Geology Pub Date: 2007 DOI: 10.1130/G24149A.1 Bibcode: 2007Geo....35.1115A