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Volcanic activity is classified by how often a volcano erupts. A volcano may be active, intermittent, dormant, or extinct.

Active volcanoes erupt constantly.

Intermittent volcanoes erupt fairly regularly.

Dormant volcanoes are inactive, but not long enough to determine whether they will erupt again or not.

Extinct volcanoes have been inactive since the beginning of recorded history.

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15y ago

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