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]
(..) - It's really very boring. - When was this? A long, long time ago... ...in a galaxy far, far away. I remember you donated to some volcano thing on our first date. Volcano? Really? Oh, wait a minute. Don't tell me that that was... Something to drink? What, did you think (..)1991 TvShow: Seinfeld Title: The Truth Season: 3 Episode 2
(..) - No, no, don't blame me. - What was I supposed to do? I was on my first date with Elaine. You come barging in here, asking me to contribute money... ...to a volcano relief fund for Krakatoa. It was supposed to erupt. I find the whole thing embarrassing. Well, you know what (..)1991 TvShow: Seinfeld Title: The Truth Season: 3 Episode 2