Scientists who were there say it was good luck - not good management - that no one was killed during the eruption on 23 1995.

How to predict when Ruapehu might next erupt is an important, but difficult, question. A group of researchers thought: why not recreate the volcano in a lab?

It’s been 30 years since a dramatic series of eruptions at Mount Ruapehu. In that time, there have been great advances in monitoring and modelling volcanoes - but we still can’t look inside a ...