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The Science of the Inevitable Taupo Apocalypse

Today, Holmes and I welcome FIRELANDS Apocalypse Blogger Challenge Winner MJ Wright. MJ is one of New Zealand’s most published historians and writers and a heckuva nice guy. His latest release, the Bateman Illustrated History of New Zealand by Matthew Wright, is available now through Fishpond for New Zealand readers. For those of us who do not live in Lord of the Rings Land, keep an eye out for it on Kindle, Kobo, and iPad.

Bateman Illustrated History of New Zealand by Matthew Wright

In addition to a guest post here today and a month-long seat of honor at the upcoming Bayard & Holmes website blog, MJ will be coming on board as one of our Social In team.  Look for more of MJ’s excellent work here or at one of the many Social In sites across the nation. Follow MJ on Twitter at @MJWrightNZ.

Congratulations on your win, MJ! We’re so pleased to welcome you to the Social In team.

Author/Historian MJ Wright

Author/Historian MJ Wright

The Science of the Inevitable Taupo Apocalypse

By MJ Wright

A couple of weeks back I read Firelands, debut dystopian thriller by US author Piper Bayard. To call the book fantastic is an understatement. I was hooked from the first pages, dropping the book I was writing myself, despite looming contract deadline, so I could keep reading.

A photo I took a few years ago. Taupo. Not a placid lake filled with trout. Well, it is. But it's also the caldera of one of the world's biggest supervolcanoes. Uh - yay.

Firelands is set in a post-apocalyptic future where the United States has become a theocratic dictatorship – a provocative setting that makes the novel far more than just Hunger Games for grown-ups. Firelands is in a class of its own. A wonderful, insightful, thoughtful and exciting story.

Bayard’s instrument of doom is a supervolcano – Taupo – that casts the world into darkness.  A scenario that’s not just plausible. It’s already happened at least twice.

I live within 260 km of Taupo’s Hatepe vent, so I thought I’d post about the historical apocalypse while scrabbling for my asbestos suit, hard hat and breathing apparatus.

On the face of it, Taupo is a lake with thermal district. The full name is Taupo-nui-a-Tia; ‘the great cloak of Tia’, referring to a flax cloak of the rangitira Tia. It’s often mispronounced. The first syllable rhymes with ‘tow’ as in ‘towing along’. Technically, Taupo should also have a macron over the o, indicating a long vowel. In IPA terms it’s‘tau-poh, which is close.

Photo taken by my wife one day in early 2005 of the Orakei Korako thermal zone just north of Taupo.

Pakeha (white settlers) got to know it in the 1840s. Donald McLean, the dour, God-fearing Presbyterian Scot who trudged into the district in 1846, saw a Christian apocalypse, confiding to his diary that ‘No person could see this place without feeling intensely the awful end of a miserable sinner, when committed to his last home; and may God in His providence prepare us all for such a serious change…’

The science behind that hellish setting emerged only as vulcanology developed through the twentieth century.

Turns out the lake is a caldera, part of an immense volcanic field stretching from Mount Ruapehu  to the Whakatane underwater volcano. The field has erupted many times. White Island is active now, monitored by a webcam and plastic dinosaur.

Geothermal steam from the Taupo system is used to generate power - up to 13 percent of the North Island's needs, in fact. The techniques were developed right here in New Zealand.

Geothermal steam from the Taupo system is used to generate up to 13 percent of the North Island’s power. This is my photo of the Wairakei station. The techniques were developed  in New Zealand.

All are dwarfed by Taupo itself, the centre of the system. The last eruption around 180 AD, from the Hatepe vents near the south of the lake, was modest by Taupo standards, but still cast the world into shadow.

The Oruanui eruption, Taupo, 26,500 BP. From http://en.wikipedia.org/wiki/File:Taupo_2.png

The benchmark remains the Oruanui eruption 26,500 years ago  (earlier analysis cited 22,690 ±230 BP), to the north of the current lake and the world’s last eruption to score 8 on the Volcanic Explosivity Index – the maximum. Back then, the lake was different, known to paleogeographers as Lake Huka. In 2012, PhD student Aidan Allen discovered the trigger for this cataclysm was likely an earthquake.

The eruption blew out the current lake bed – and more. Everything in the central North Island was destroyed by a fall of ingimbrite some 200 metres deep. Then there were devastating floods. Even the major river, the Waikato, changed its course. Ash fell  as far away as the Chathams.

It was a world cataclysm. Although debate continues over specific triggers for Pleistocene glacial cycles, there is evidence that the worldwide glacial maximum that began 26,500 years ago was pushed, in part, by this eruption. In New Zealand, certainly, a warming period prior to the eruption came to a dead stop afterwards.

Oruanui may not have caused the glacial cycle alone – but  it made things worse. Humanity was nearly wiped out in the deep cold that followed. The downturn seems to have been the last blow for Neanderthals, our cousin species already reduced to the edge of extinction at Gibraltar. It destroyed a nascent H. Sapiens agricultural revolution among the Gravettian culture in what are now Russian steppelands. Had that not been cut short, civilisation might have been with us 20,000 years earlier.

This was the apocalypse, Pleistocene style.

And to give that perspective, the Oruanui blast was itself dwarfed by the Whakamaru eruption in the same zone, 254,000 years ago.

We’ll have warning before the next one. Taupo is monitored by New Zealand’s Geological and Nuclear Sciences department via GPS and seismographic stations. No rubber dinosaur, but hey…

Hopefully it won’t happen in our lifetimes. Because when it does, it will bring the apocalypse. Certainly for New Zealand, maybe the world.

Copyright © Matthew Wright 2013 


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