Graham Leonard

The ring of fire is more than just a Johnny Cash song, and it affects us here in the Pacific. But what is the Pacific Ring of Fire and what drives it?  Audio

Volcanologist and Earth Sciences New Zealand principal scientist, Graham Leonard is back this week looking at the technology driving new Earth science.  Audio

Earth Sciences New Zealand principal scientist, Graham Leonard is back this week looking at the role of social science in the delivery of disaster warnings.  Audio

Volcanologist and Earth Sciences New Zealand principal scientist, Graham Leonard is back this week covering the challenge of flooding in Aotearoa.  Audio

The tsunami threat following this week's earthquake is mostly gone but NEMA is warning there could still be strong and unusual currents until Monday. Audio

Auckland is known for its volcanic cones - and while an eruption is very unlikely to happen, the volcanic field is technically still active. Audio

Taranaki Mounga is one of New Zealand's about a dozen active volcanos - but what does that actually mean for locals?  Audio

Space weather isn't watercooler conversation but it's out there! Audio

Volcanologist and GNS principal scientist Graham Leonard talks about the fault that caused the 7.7 magnitude earthquake in Myanmar. Audio

On the second anniversary of Cyclone Gabrielle, GNS Science principal scientist and friend of the show Graham Leonard joins Mihi to talk about landslides.  Audio

This week GNS released a high resolution update to the national Active Faults Database, detailing where the active faults are across the motu.  Audio

Volcanologist and GNS principal scientist Graham Leonard shares everything you need to know about tsunamis ahead of the upcoming UN World Tsunami Awareness Day. Audio

Volcanologist and GNS principal scientist Graham Leonard explains the difference between onshore and offshore volcanoes, and why it's important. Audio

Last week a hydrothermal explosion blew rock and steam into the air, destroyed a boardwalk and sent tourists running in the Yellowstone National Park. GNS Science principal scientist Graham Leonard… Audio

How risky is it to ski on Ruapehu, and what have we learned from previous eruptions, both recent and historic? Audio

New Zealand's volcanoes are world renowned, and most Kiwis are familiar with our big ones such as Ruapehu, Taranaki and Tarawera. But what about our lesser talked about volcanoes? GNS Science… Audio

The plumes of ash that can accompany volcanic eruptions are spectacular, but often damaging, in multiple and surprising ways. Most people think what comes out is like fire ash, but volcanic ash is… Audio

GNS principal scientist Graham Leonard looks into why we choose to live where we live, and what the risks are. Graham has recently taken over at GNS as Natural Hazards and Risk Theme Leader. He talks… Audio

Long or Strong - Get Gone! - most of us know this advice on when to evacuate due to tsunami risk following an earthquake, but if it happened would we actually act? Surveys suggest around a third of… Audio

Auckland's iconic landmarks Mount Eden, One Tree Hill, and Rangitoto are all evidence of the 360 km2 volcanic field that lies beneath our largest city. The field has erupted at least 53 times in the… Audio