A laboratory volcano (10): application to Kilauea
General trend: decrease of gas flux
in time
1st bubbles are the largest and the
latest bubbles the smallest
tf*
=
d02 (rliq - rgas) g
18 m hc
tf
=
d02 (rliq - rgas) g
18 m hc
tf
=
d02 (rliq -
rgas) g
18 m hc
te
te*
Duration of fire fountain tf :
tf*= 1.1 : Puu O’o eruption (1987-now)
tf* = 1.3 : Mauna Ulu eruption (1969-1971)
Duration of eruption te :
te*= 4.2 : Puu O’o eruption (1987-now)
te* = 4.3 : Mauna Ulu eruption (1969-1971)
Mean bubble diameter: 0.4 mm: Puu O’o and Mauna Ulu eruptions
Degassing layer = 2 km (Puu O’o) and 300 - 500 m (Mauna Ulu)
Duration
of Puu O’o eruption is 6 times longer than Mauna Ulu
2 dimensionless times based on observed durations : tf*and te*