A very large earthquake in the central North Island could trigger a big lahar from Mt Ruapehu. In the recent past it's been eruptions that have led to lahars on the mountain. But scientists from Canterbury University have checking what else might cause cause mud and debris to spew out of the crater lake.
In the programme this week - the former New Zealand cricket captain Stephen Fleming talks about plans for a charity cricket match to raise funds for victims of the Canterbury earthquake. We hear about the role of sports chaplaincy in New Zealand sports teams, Blyth Tait talks about his return to top level Equestrian competition after a seven year absence and one of the country's premier mountain biking events, the Karapoti Classic, near Wellington is underway again.