Gordon Campbell has written several articles about the White Island tragedy and they include some detail that's worth reading. For example:
https://www.scoop.co.nz/stories/HL1912/S00100/gordon-campbell-on-a-white-island-inquiry.htm
From the above:
In early December, GNS Science had reported increasing volcanic activity, subsequent to the prior elevated risk warning that it issued on November 18. The bolded emphasis in this December 3rd GNS Science release is mine:
Moderate volcanic unrest continues at Whakaari/White Island, with substantial gas, steam and mud bursts observed at the vent located at the back of the crater lake…..Explosive gas and steam-driven mud jetting continues from the active vent area at the back of the crater lake on Whakaari/White Island. The level of activity at the vent is variable and when in a stronger phase, some material is being deposited about the vent area. This style of activity has been present since late September, although it is occurring more frequently now…
In November, GNS volcanologist Dr Michael Rosenburg had indicated that the changes being observed may or may not be a signal that something was happening, but this uncertainty shouldn’t be cause for undue concern.
"The White Island volcano is really complicated and just because one thing changes, it doesn't necessarily mean that everything else will change and it doesn't necessarily mean that this is going to lead to an eruption.” Dr Rosenburg said tour groups could still visit the island.
Now it's interesting that Dr Rosenburg reportedly said that "tour groups could still visit the island".
Yet it seems as if GNS Science had been watching that process of the sealing materials being deposited, but without raising the alarm level. And without additionally warning the tour operators - or the public - of the potential consequences.
So did GNS Science do enough to warn tour operators and the public of what they new about the heightened risk of eruption?
Overall, a good article (IMHO).

