Graham Leonard

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

About 1800 years ago a powerful super-eruption of the Taupo volcano resulted in a plume of ash that coated lakeside areas in tens of metres of pumice and ash and a lava flow that spread up to 90… Audio

Ruapehu, the largest active volcano in Aotearoa, and its neighbour Tongariro, are iconic mountains in the central North Island. They don't look like most other New Zealand volcanoes though - their… Audio

Friday morning got off to a shaky start, and there was little respite for thousands of coastal residents who were sent scrambling for the hills.

There were three significant quakes - the first… Video, Audio

The night after Whakaari White Island erupted, heavy rainfall combined with ash, creating a sediment wave that likely flushed the bodies of the two missing victims down a stream into the ocean.

Local… Audio

Experts from GNS science are still advising police on the recovery operation on Whakaari/White Island.

There have been no further eruptions since Monday's fatal blast, but the situation is still… Audio

GNS Senior Volcanologist Graham Leonard, who is monitoring Whakaari, says sympathies lie with the families of those who haven't been returned. He says the volatility of the volcano at the moment means… Audio

Yesterday the Ministry of Civil Defence was on standby for a possible tsunami threat after a magnitude 7 earthquake hit the Kermadec Islands. The Kermadecs are a chain of volcanic islands around 900… Audio