White Island sightseers are being warned another eruption could occur “at any time with little or no warning”.
The warning followed a small eruption at the island at 10.23am today.
Bay of Plenty Civil Defence Emergency Management has downgraded the emergency status for the White Island eruption from red to yellow.
Group spokesman Clinton Naude said the eruption appeared to have lasted for about 10 minutes and produced mainly steam.
Civil Defence was still monitoring the situation which arose from a GNS Volcanic Alert Bulletin sent out this morning.
Local tour operators and other parties have been kept informed.
“Based on GNS’s advice the main risk from any activity is to people visiting the island,” Mr Naude said.
“As White Island is an active volcano people visiting the island and vessels travelling nearby are advised that they should be cautious as an eruption could occur at any time with little or no warning.”
Civil Aviation Authority spokesman Matthew Shore said no advisory warnings had been issued to aircraft.
“GNS has reported that the eruption is steam, with virtually no ash, and so poses no risk to aviation.”