Is your house ready for a direct hit from a volcano? A team of scientists is researching just how hard urban volcanoes hit to try and help Aucklanders prepare for an eruption. Amongst other things this has involved building simulations of rooves and firing volcanic rocks at them. But it's not just rocks we have to worry about. Disaster risk and resilience Professor Tom Wilson from the University of Canterbury is leading the team looking into this and he joins me now.