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Hydrothermal Eruption

Hydrothermal Eruption

Earthquake or volcanic activity can trigger a decrease in the fluid pressure of a geothermal system, inducing instability and boiling in the shallow portions. This causes steam (hydrothermal) explosions to occur.

Damage from hydrothermal eruptions are generally limited in extent (a few hundred metres from the vent), and cause damage only to the immediate area around the active vent.

They do not produce ash clouds, but can deposit muds.