The activity of the volcano continues at fluctuating levels during the past few months and currently continues at low levels.
GeoNet reported that gas emissions have declined to normal levels on 30 Dec last year.
On 29 Dec a volcanic tremor has decreased and remains at low levels.
Chemical analysis of water collected from Crater Lake (Te Wai ā-moe) on 31 Dec showed small changes in key parameters since previous observations a few weeks earlier on 2 Dec.
The temperature of water in Crater Lake (Te Wai ā-moe) reached a maximum of 43 °C on 21 Dec and in the last three weeks has declined to 40°C.
Approx. 200 MW (megawatt) of heat is still entering the lake and is expected to lag behind the high gas emissions observed in mid-December. A decline of lake temperature is expected.
The key parameters of the reduced unrest at the volcano are the low volcanic gas emission rate, the reduced level of volcanic tremors, and the small changes in lake water chemistry.
The Volcanic Alert Level is lowered to Level 1 and the Aviation Colour Code is lowered to Green.
Source: GeoNet New Zealand volcano activity update 11 January 2021