Each explosion corresponds to
large bubble bursting
(diameter of several meters)
Recent activity: a series of regular eruptive episodes
(64 episodes in 2000; 15 episodes in 2001; id 1989; 1998)
each episode: a series of Strombolian explosions
a episode lasts a few hours, intermittency: a few days
Etna,
July 2001
(Pfeiffer)
A laboratory volcano (12): application to Etna
(Italy)
Acoustic measurements
gas volume at vent
