[Rockhounds] Why did White Island (Whakaari) Volcano, New Zealand, erupt as it did?

[Paul]

A short, concise, and understandable explanation of the tragic eruption
of White Island (Whakaari) Volcano, New Zealand, is:

What caused the White Island volcano to explode the way it did? ABC News
https://www.youtube.com/watch?v=_93KoBrZEwY

A concise description of White Island (Whakaari) Volcano, New Zealand,
can be found in “Magmatic-hydrothermal system at White Island volcano,
North Island, New Zealand, Carlos Jimenez, on pp. 35-43 of:

JCU SEG Student Chapter, Guide Book
New Zealand, North Island Field Trip 2015
https://www.segweb.org/pdf/events/2016/16JCFT-Guidebook.pdf

Yours,

Paul H.