Department of Earth Sciences;
via G La Pira;
4;
50121 Florence;
Italy;
Department of Sciences;
Ha Vivaldi 43;
81100 Caserta;
Italy;
Department of Earth and Environmental Geological Sciences;
R Porta San Donato;
1 40126 Bologna;
Italy;
Volcanological Observatory of Goma;
Goma;
Democratic Republic of Congo;