Following the recent eruption at the volcano on 28 August, an observation flight footage confirms that the activity generated a thin layer of tephra on the island. The active vent area remains unchanged, indicating that no large-scale activity has occurred. The eruptive activity has not continued, and none was observed during the flight.
A vent temperature of 164 °C was recorded, which is typical for unrest rather than eruptive activity. This fumarole temperature is relatively low compared to past periods of heightened activity, when vent temperatures often exceeded 400–600 °C due to shallow magma beneath the vent. Data from gas-monitoring flights and satellite observations also show stable gas emissions, supporting the assessment of only minor activity. Overall, these findings are consistent with moderate to heightened unrest, and the Volcanic Alert Level remains at 2.
Source: Geonet New Zealand volcano activity update 9 September 2025