Etna: some eruptions show intermittency between eruptive
episodes and quiet periods (1989,1998, 2000, 2001…)
A laboratory volcano (8): origin of fire fountains
Eruptive episode: a
series of Strombolian
explosions leading to fire fountains
September 26, 1989 at 8:30 height:
600 m
July 25 2001