an active 'volcano' [=a volcano that could erupt at any time or that is erupting now]
a dormant 'volcano' [=a volcano that is not currently active]
an extinct 'volcano' [=a volcano that does not erupt anymore]
(..) of anonymity. Surely, you of all people understand that. I was just wondering, of all the places to settle down, why live... With a volcano? He's attracted to power. So am I. - It's a weakness we share. - Seems a bit unstable. I prefer to think of it as misunderstood. (..)2004 The Incredibles