Mt Ruapehu's crater lake temperature has again cooled after a period of heightened temperatures earlier this year.
Geonet duty volcanologist Agnes Mazot said the temperature was now sitting at a cooler 26C after the crater lake temperature rose to 43C in December last year and to 40C later in April.
"Following the period of heightened unrest activity in December 2020, volcanic activity at Mt Ruapehu has remained at a low level over the past six months, with gas emissions, lake chemistry, and volcanic tremor all within typical ranges," Mazot said.
"After the December period of high temperatures, the crater lake cooled then reheated in early April before cooling again now to around 26C."
In December, Geonet raised the Volcanic Alert Level of the mountain to two, indicating a heightened risk of volcanic eruption.