How often do 'extinct' volcanoes become active?

An extinct volcano is one that no longer has a source of magma underneath it, and therefore has no way to erupt. read more

The lava field is extinct, so all of the volcanoes are extinct; none of them have magma sources available, or have for around 300,000 years – not very long by geological standards. Now, there is a catch. read more

So, how do I differentiate between active, dormant and extinct volcanoes. This is my personal take (with input from the volcanological community) and to me, it's all about potential. If you have a different definition, feel free to leave that in the comments. read more

Active volcanoes have erupted recently. A dormant volcano isn't erupting right now. But volcanologist expect it would erupt at any time. Extinct volcanoes haven't erupted for ten thousand years and aren't expected to erupt again. read more