Phreatomagmatic Eruption - John Seach

A phreatomagmatic eruption is an explosive water-magma interaction.
This type of eruption produces fine grained tephra.
Large amounts of steam and magmatic gases are emitted.
An example of a Phreatomagmatic Eruption was the eruptions of Mt Usu in Japan in April 2000.
 

Phreatomagmatic Eruption
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