By definition, a supervolcano is one which has had an eruption of magnitude 8 – the highest and most violent possible – on the Volcano Explosivity Index (VEI) throughout its history. The US is a hotspot for supervolcanoes, with four located in the North American country, while Europe only has the one – but it is one which could destroy the continent – Campi Flegrei in Italy. The most recent supervolcano eruption came 26,000 years ago, when Taupo, located in New Zealand’s North Island, burst into life shoving 1200 cubic km of pumice and ash into the atmosphere.
By some studies, this means a supereruption is long overdue.
A 2017 study from Jonathan Rougier, a professor of statistical science at the University of Bristol, found that a super eruption occurs roughly every 17,000 years.
By Prof Rougier’s reasoning, we are overdue a supereruption, and he said we are “slightly lucky not to experience any”.
Now, one expert has warned that humanity can do little to prevent a supereruption, and that it could spell the end of our species.
Bryan Walsh, author of the new book End Times which examines the existential threats to humanity, told express.co.uk: “We don’t have any means to stop a volcano from erupting and that worries me.
“Even experts in this field, when they look at natural threats they believe a supervolcano eruption is most likely.
“There hasn’t been a supervolcano eruption in 26,000 years so it is unlikely that one will happen tomorrow, or the next day or in a hundred years but the threat still remains and there is no defence against it and that would be a global catastrophe.
“With warning we can take some steps to evacuate people, but we can begin to think about how it will impact global agriculture and supply chains, what can we put in place now to prepare for this horrific event.
“But if we are caught off guard then it is very hard to see how we will survive.”
There are 20 known supervolcanoes in the world which have the potential to cause a super eruption, including Yellowstone and the Long Valley Caldera, both in the US, Toba in Indonesia and Aira Caldera in Japan.
A super eruption could cause a dramatic climate shift which would effect humanity.
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The United States Geological Survey (USGS) said: “Such a giant eruption would have regional effects such as falling ash and short-term (years to decades) changes to global climate.”
They would also effect the landscape of the planet.
The USGS continued: “Such eruptions usually form calderas, broad volcanic depressions created as the ground surface collapses as a result of withdrawal of partially molten rock (magma) below.”
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