Where is the most dangerous place in New Zealand right now? Tongariro?
Well no one will let you anywhere near that crater right now, but it is not Tongariro - it's White Island, which has also been erupting since Sunday.
GNS had their suspicions, but they didn't categorically know what was happening on the island until chief volcanologist Brad Scott took a trip out to the volcano this morning.
He sighted ash, which means the magma is rising and the volcano is erupting
The vent is now 50 metres wide, and has built what is known as a tuft cone.
As magma rises closer to the surface it forces powerful gases upwards, smashing through rock. This pulverised stone becomes ash.
White Island's most recent eruptive phase began in 1975 and lasted 25 years.
Who knows how long this new phase will last, but it is at the beginning of this cycle that volcanoes like Tongariro and White Island are at their most dangerous.
So is the Bay of Plenty at risk? No volcanic material from this volcano has ever been found on the mainland, so the risk is low.
But as for visiting the island - tourist operators are now advised to take extreme caution.
Watch the video to see Natasha Utting’s exclusive report.