I remember reading in the Auckland Museum , that Auckland sits on a volcanic field. Currently dormant, the field might erupt again within the next 1000 years, says Wikipedia.
There is a contingency plan set in case of a "disaster", The Auckland volcanic region is what is called as Mono-genetic. This means that one volcano will only erupt once. So if there were to be a volcano in Auckland, it would mostly have to be a new one. When can this volcano occur? That is not known. It can or cannot happen anytime. :D Hows that for the prompt?
The symbol of this volcanic region has to be the Rangitoto Islands which is a shield volcano. This was an island formed from a series of eruptions about 600 years ago.
|Rangitoto Island Src: Wikipedia.com|