30. Phreatic
-Hydrothermal or Steam-Blast
-driven by explosive expanding
steam resulting from surface water
coming into contact with hot rock
-triggered by earthquakes
-onset/beginning of a larger
eruption
36. Strombolian
-driven by the bursting of gas
bubbles within the magma. When
this bubbles reach the surface, they
burst with loud pop mainly because
of the difference in air pressure
inside and outside the volcano
40. Vulcanian
-characterized by tall eruption
Involves a series of violent, noisy
and short-lived explosions lasting
from few minutes to few hours
accompanied by the ejection of
volcanic bombs and blocks
43. Plinian
-most explosive and most powerful
-features large explosive vents that
form enormous dark columns of
tephra and gas high into the
stratosphere
44. Plinian
-most dangerous features are the
pyroclastic flows produced by material
collapse which landslide along the side
of the mountain at a very high speed
(700kph)
