Mount Ruapehu is the largest active volcano in New Zealand and is composed of three major peaks: Tahurangi (2,797 m), Te Heuheu (2,755 m) and Paretetaitonga (2,751 m).
The deep, active crater is situated between the peaks and fills with a crater lake between major eruptions.
On April 29, 2016, the volcano was struck by a series of earthquakes and volcanologists from GNS are uncertain of the implications of the recent observations.
Moreover, the temperature of the Crater Lake has been rising from 25C to 40C since mid-April 2016.
At this time this volcanic earthquake swarm and this large change in temperature are not enough to change the volcanic alert level by specialists although swarms of volcanic earthquakes like these are uncommon on Ruapehu.
These changes at Mt Ruapehu are probably not related to White Island’s volcanic eruption on April 27, 2016.