GEOLOGY

Detailed explanation-1: -Dormant volcanoes have not erupted for a very long time but may erupt at a future time.

Detailed explanation-2: -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. IMAGE. Extinct → Extinct volcanoes are those which have not erupted in human history.

Detailed explanation-3: -As such, some volcanologists refer to extinct volcanoes as inactive, and some volcanoes once thought to be extinct are now referred to as dormant.

Detailed explanation-4: -Volcanoes go dormant because magma from the Earth’s mantle can no longer reach the volcano. For example, in Hawaii, the line of islands are slowly moving to the northwest. Meanwhile, the supply of magma stays in the same place within the Earth, which currently happens to lie beneath the Big Island.

Detailed explanation-5: -Dormant: Now things get a little dicier. The USGS defines a dormant volcano as any volcano that is not showing any signs of unrest but could become active again. California’s Shasta is a dormant volcano by that definition (although could be considered “active” by some because it has erupted in historic times.)