Volcano of classifying magmatic volcanoes is by their frequency of eruption, with those that erupt regularly called active, those that have erupted in historical times but are now quiet called dormant or inactive, and those that have not erupted in historical times called extinct. However, these popular classifications—extinct in particular—are practically meaningless to scientists. They use classifications which refer to a particular volcano's formative and eruptive processes and resulting shapes. There is no consensus among volcanologists on how to define an "active" volcano. The lifespan of a volcano can vary from months to several million years, making such a distinction sometimes
Dormant commission Dormant commission A dormant commission is a commission in a Commonwealth realm that lies dormant or sleeping until it is triggered by a particular event. Historically, a dormant commission was given in relation to a military command. During the Crimean War, Sir George Cathcart held a dormant commission to take command of the British Army in Crimea if Lord Raglan was killed or disabled. In Australia, Section 4 of the Constitution allows the Queen to appoint an administrator to carry out the role of Governor-General when there is a vacancy. The Governors of the Australian states, by convention, are given