Everything about Dormant Volcano totally explained
A
dormant volcano is a
volcano which isn't currently
active (that is, not
erupting nor showing signs of unrest), but is believed to be still capable of erupting. This contrasts with an
extinct volcano, where it's believed that no eruptions will occur for the foreseeable future. The term is also used to refer to dormant volcanic fields such as the
Auckland volcanic field.
In practice, it's often impossible to distinguish between a dormant and an extinct volcano and several volcanoes thought to be extinct have subsequently re-erupted. Volcanoes can be dormant for hundreds or thousands of years and, due to the lack of eruptions, are usually
eroded and worn down. The eruptions from a dormant volcano are usually very violent because the
plug inside the volcano stops the
lava from coming out of the vent for a very long time, thus building pressure. The volcano will then erupt again and be classified as an
active volcano.
The volcano can be referred to as "asleep," since it isn't expected to erupt anytime in the near future, but it's said to erupt soon, within the next 100 years. It is quite possible, however, that the volcano will eventually be active again. Dormant volcanoes sometimes have
hot springs and
fumarolic activity, when
steam and hot
volcanic gases, such as
sulfur dioxide, are emitted.
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