About Ruapehu - GeoNet

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In addition to the usual volcanic hazards, the crater lake of Ruapehu ejects frequent lahars.

The eruption of Ruapehu, June 1996.

The eruption of Ruapehu, June 1996.

The eruption of Ruapehu, June 1996.
Scientists collecting crater lake samples.

Scientists collecting crater lake samples.

Scientists collecting crater lake samples.

At 2797 m, Ruapehu is the highest mountain in the North Island. Three summit craters have been active during the last 10,000 years including South Crater which contains the currently active vent. The active vent is filled by Crater Lake; water from this lake is frequently ejected on to the ice and snow during eruptions causing lahars.

Most Recent Eruption
When 25 September 2007 Where Ruapehu Effects This was an explosive eruption, lasting about 7 minutes. During the eruption explosions spread ash, rocks and water across the summit area, producing lahars in two valleys including one in the Whakapapa ski field. In contrast with the previous eruptions in 1996, there was no high ash plume to produce ash fallout over a wide area. About GeoNet Contact NGMC Data Policy Disclaimer Privacy Sponsors Reviews Plans & Reports Get our GeoNet App GeoNet logo Earth Sciences New Zealand logo Natural Hazards Commission Toka Tū Ake logo GeoNet logo

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