GEOLOGY

Detailed explanation-1: -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-2: -Notable precursors to an eruption might include: Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground. Subtle swelling of the ground surface. Small changes in heat flow. Changes in the composition or relative abundances of fumarolic gases.

Detailed explanation-3: -An active volcano is one that is erupting or has erupted recently. The International Association of Volcanology (IAVCEI) defines a potentially active volcano as one that has erupted during the past 10.000 years. In using the 10.000-year time span, the number of active volcanoes in the world is more than 1500.

Detailed explanation-4: -If your volcano is making noise or popping off, then its active. If your volcano has erupted in the past but right now is quiet, it is likely dormant. If your volcano hasn’t erupted in over a million years, you have yourself an ex-volcano.

Detailed explanation-5: -Hydrothermal eruption: These eruptions include ash and not magma. Phreatic eruption: This is driven when the heat of the magma interacts with the water. Phreatomagmatic eruption: This eruption takes place when there is an interaction between the newly formed magma and water. More items