Such a volcano is said to be active.
The common term is 'active'. This contrasts to a volcano that has not recently erupted - which is termed 'dormant'.
A volcano that has erupted recently is classed as an active volcano.
active
The name of the volcano that erupted in Iceland is Eyjafjallajökull.
A volcano that is currently erupting or has recently erupted is called an "active volcano." Active volcanoes are characterized by ongoing tectonic activity that results in eruptions, which can vary in intensity and type. In contrast, dormant volcanoes have not erupted in a long time but may potentially erupt again, while extinct volcanoes are not expected to erupt in the future. Monitoring active volcanoes is crucial for assessing hazards and ensuring public safety.
Vent
A volcano that has not erupted recently is referred to as a "dormant" volcano. Dormant volcanoes have the potential to erupt again in the future, but they have not shown any activity for a significant period of time. In contrast, an "extinct" volcano is one that is unlikely to erupt again.
The second eruption is called a reawakening or re-eruption.Most volcanoes erupt multiple times over the course of their lifespan; the period during which a volcano doesn't erupt is called its dormant period or dormancy.
It is called a active volcano. Inactive volcanoes have not erupted for more than a century.
"WhatIS IT CALLED when a Volcano is not active" do you mean? It is known as Extinct or Dormant
The volcano is called Eyjafjallajökull.
A volcano that has erupted at least once during the past 10,000 years is called an active volcano. Active volcanos can be further classified as erupting or dormant. An erupting volcano is an active volcano that is currently having an eruption. A dormant volcano is an active volcano that is not erupting, but that is due to erupt again.