PHREATOMAGMATIC
ERUPTION
PHREATOMAGMATIC ERUPTION
Phreatomagmatic volcanic eruption is
an eruption that involves both magma and
water, which typically interact explosively,
leading to concurrent ejection of steam and
pyroclastic fragments.
PHREATOMAGMATIC ERUPTION
"Phreato" refers to water, while "magmatic"
relates to magma.
When magma interacts with water, such as
groundwater or surface water like lake oceanic
water and glacial environment, it rapidly heats
the water, causing it to vaporize and expand.
PHREATOMAGMATIC ERUPTION
The sudden expansion generates powerful
explosions, creating ash, steam, and fragments
of rocks and magma that are ejected into the
air.
PHREATOMAGMATIC ERUPTION
Phreatomagmatic eruptions can be highly
explosive and produce distinctive volcanic
features, such as tuff rings and maars, which
are craters formed by the explosive interaction
between magma and water.
PHREATOMAGMATIC ERUPTION
Tuff rings- are circular or oval-shaped
landforms formed by explosive volcanic
eruptions when magma interacts with water.
They have a raised rim made up of layers of
fragmented volcanic material and a central
depression.
PHREATOMAGMATIC ERUPTION
PHREATOMAGMATIC ERUPTION
Maars-are shallow, broad craters formed by
explosive phreatomagmatic volcanic
eruptions. They result from the interaction of
magma with water, causing a violent
explosion.
PHREATOMAGMATIC ERUPTION
PHREATOMAGMATIC ERUPTION
TAAL VOLCANO
Example:
-Taal volcano
Between January
29 and 30, the
volcano had nine
phreatomagmatic
bursts on its main
crater.