a volcano that continues to erupt regularly.
A volcano that is erupting. Also, a volcano that is not presently erupting, but that has erupted within historical time and is considered likely to do so in the future.
volcano that has erupted recently and is likely to erupt again.
A volcano that is currently erupting, or has erupted during recorded history.
A volcano that has recently erupted, is currently erupting, or is likely to erupt again.
An active volcano is one that has erupted in recorded history or is currently erupting.
a volcano erupting or liable to erupt
