Ngauruhoe is a young cone that has grown on the south end of the Tongariro complex.
Ngauruhoe is the largest and youngest of the Tongariro cones being about 7,000 years old. Ngauruhoe
is the most continuously active of the volcanoes in New Zealand, with the Māori recording
many eruptions prior to European colonisation. The first European description was an eruption
in 1839. Many of the recent eruptions have produced lava flows down the side of the cone, the
last having been in 1954.
Most Recent Eruption
- 1973 to 1975
- In January 1973, Ngauruhoe discharged red-hot blocks of lava, and periodic activity
continued throughout the year. In 1974 and 1975 there were explosive eruptions of ash,
and blocks of lava were thrown as far as 3 km away. During the last violent eruption,
gases streamed from the crater for several hours, producing a churning plume of ash that
towered up to 13 km above the crater. This column then collapsed and formed ash and
scoria avalanches that swept down the sides of Ngauruhoe, leaving trails of rubble in their wake.