SCIENCE
HOT ROCKS & WATER
phreatic or hydrothermal
BURSTING
STROMBOLIAN
DEADLIEST AND POWERFUL
PLINIAN
TALL ERUPTION
VULCANIAN
HIGH SILICA & TOO VISCOUS
figure 2
Less silica & less viscous
figure 1
low gas content & high silica
figure 3
low gas content & high viscous
figure 4
magma and water
phreatomagmatic