Fred99:
I'm not qualified to comment, but here's the publicly available monitoring data, general activity at the top (nothing much to see there), spectral analysis at the bottom. The gradually increasing level of activity is pretty normal and was commented on by Geonet. (I've been looking at these things out of interest for a long time). It waxes and wanes, usually nothing much happens. The quake then a sudden drop of activity about a day ago might have raised eyebrows. I'd conjecture that the drop in activity was because lava broke through rock (at depth), relieving pressure, then the rest is history.
Worth pointing out the Geonet data published on those pages is one bit of what they collect. If they had seen something in a dataset, they would have said something. They've been offering updates on White Island for the past few months.
The CNI volcanoes will just stack themselves with little to no warning sometimes. Short of the activity system and the seismographs, I'm not sure what else Geonet could reasonably do.




