Two "short-lived" eruptions were observed at Whakaari/White Island yesterday afternoon, volcanologists say.
The first eruption took place at 12.30pm on Thursday, followed by a second at 6.40pm.
Both were described by Earth Sciences NZ as small, low-energy events, with the latter depositing ash close to the island.
Earth Sciences NZ volcanology team leader Agnes Mazot said no further activity had been observed since the eruptions.
The Volcanic Alert Level remained at Level 3, indicating minor unrest. The Aviation Colour Code also remains Orange, signalling a heightened risk to aviation due to potential ash emissions.
While volcanic ash was not observed in satellite imagery, sulphur dioxide (SO₂) was detected, confirming the presence of volcanic gases. The second eruption appeared to last only a few minutes.
Mazot said short-lived increases in degassing or steam might continue, potentially generating plumes of gas – possibly containing minor volcanic ash – with little or no warning in coming days.
"Earth Sciences NZ Volcano Monitoring Group and National Geohazards Monitoring Centre will continue to closely monitor Whakaari/White Island for any changes in activity.
"Without sensors on the Island, our monitoring continues to rely on remote cameras, satellite imagery, and periodic observation and gas flights to monitor Whakaari/White Island."
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