Conclusion (1):
Hawaiian eruption: cyclicity between fire fountains and effusive
activity
Fire fountains (Puu
O’o eruption)
Lava
flow into sea
(Kilauea,
March 1988)
Cyclicity is related to the
degassing
reservoir: formation of a foam
at
the top of the reservoir
Eruption stops when magma chamber does not contain much bubbles
bubble diameter in
reservoir = 0.4 mm