Laboratory experiments (11):
The
experiments reproduce:
Fire fountain = collapse of the
magmatic
foam at the top of reservoir
Effusive activity = rebuilt of the foam
1) Each eruptive regime
2) Cyclicity between the two regimes
3) Some details of the
eruption:
- large variations of magma
level
- at the end of fire fountain:
conduit is emptied
- drainback of magma
- gas piston activity
Eruptive activity is dominated
by the dynamics of the foam
at the top of the reservoir
Puu O’o (Kilauea, May 2004)