CENTRAL North Island’s Mt Tongariro continues to let out steam and gas but below the surface remains quiet.
In August and November last year the Te Maari craters erupted, and remain active with continued emissions of steam and volcanic gas.
GNS Sciece said the gas was coming from a large fumarole and a crack in a cliff.The main Upper Te Maari crater is also letting out gas, although at a lesser rate.
“Gas and steam emissions from the volcano will continue to be a feature of the mountain for several years to come,” GNS head vulcanologist Gill Jolly told Fairfax NZ.
Volcanologists are to take new gas readings to compare with those taken late last year.
Observations from the air showed the crater had been filled with a large amount of debris, but the shape of the crater had not significantly changed.
GNS said Tongariro continued to be in a heightened state of unrest and eruptions could occur with little or no warning.