GEOLOGY

Detailed explanation-1: -Dormant → Dormant volcanoes are volcanoes that have not erupted in a long time but are expected to erupt again in the future. Examples of dormant volcanoes are Mount Kilimanjaro, Tanzania, Africa and Mount Fuji in Japan. Extinct → Extinct volcanoes are those which have not erupted in human history.

Detailed explanation-2: -Eruptions can be as short as one day, or can erupt for hundreds of years. Active volcanoes are those that have the potential to continuously erupt. Once a volcano becomes active, it takes an average of ten years for the eruption to finish.

Detailed explanation-3: -Volcanologists use that term as shorthand for “potentially active, ” so a “dormant” volcano is one that is not erupting now, but that is considered “active” because it could erupt in the future. Mount Hood is an active volcano that is currently dormant. Kīlauea is an active volcano that is currently erupting.

Detailed explanation-4: -An eruption will usually last until the local melt has been depleted, or until the gas pressure inside the magma chamber falls to a level at which gas is no longer trying to escape. Certainly this is a fairly simplified overview.