the Earth is a gigantic ball of semi molten rock with a heart of iron as hot as the surface of the Sun Titanic amounts of heat left over from its birth and the radioactive decay of trillions of tons of radioactive elements find No Escape but up currents of rock spanning thousands of kilometers carry this energy to the surface Earth's crust is the only thing in their way it feels solid to us but it's only a fragile barrier an apple skin around the claiming Behemoth true apocalypses can break through and unleash eruptions tens of times more
powerful than all of our nuclear weapons combined subjecting the climate to centuries worth of change in a single year while drowning continents in toxic Ash and gases super volcanoes how big can they get and will they put an end to humanity [Music] volcanoes there are many types of volcanoes from towering mountains to lava domes but they have two main sources the first is at the boundaries between tectonic plates the pieces of the crust that cover the Earth like a giant jigsaw puzzle there are seven major tectonic plates and dozens of smaller ones drifting against each
other at up to 15 cm per year this sounds slow but on geological time scales it is a Titanic struggle over who gets to stay on the surface the winning plate crumbles into a new mountain range while the loser is shoved underneath into an ocean of hot rock at 1300° C the asthenosphere the temperature here is enough to melt rock into a liquid but the insane pressures of all that mass keep it a superheated solid tectonic plates are usually in contact with water for thousands of years and absorb some of it when they're submerged into
the hot underworld this water triggers chemical Transformations that allow tiny portions to melt into magma liquid magma is less dense than Solid Rock so it rises to the surface in Furious bubbles that accumulate in sponge-like reservoirs right under the crust if enough magma accumulates it becomes powerful enough to pierce through the crust which we experience as volcanoes this happens under the winning plate like a Revenge attack by the loser before it's erased forever the second main source of volcanoes are thought to be mantle plumes these are columns of abnormally hot rock that rise all the
way from the planet's core mantle boundary to the surface much less is known about them but in a way it's as if the Earth's mantle has weather patterns and mantle plumes are a little like hot air rising to form storm clouds storms hundreds of millions of years old made of rocks circulating at a rate of a few millimet per month they don't care about the motion of tectonic plates so they can break the crust to create volcanoes in the middle of nowhere that stubbornly stay active as the crust shifts around them the volcanic boom meter
scientists love to put big booms on a scale and came up with a logarithmic scale that measures the volume ejected during an eruption the volcanic explosivity index or VII simply put it starts really small and gets very big very quickly a vii2 eruption would fill 400 full Olympic swimming pools with lava we have around 10 of these per year at vii3 we already see devastating effects like the eruption of the samaru volcano in 2021 that destroyed thousands of homes in Indonesia at vii5 we see catastrophic amounts of materials cubic kilometers of debris equivalent to an
entire Lake of molten rock blasted into the air like the 2022 hunga Tonga hunga haai eruption that sent a shock wave around the globe many times and created ocean white tsunamis at a VII of six an eruption can change the world in 1883 the Indonesian island volcano katoa erupted nearly continuously over the course of 5 months one of those eruptions blew it apart producing the loudest sound recorded in history 10 trillion times louder than a Rocket taking off heard Halfway Around the World 30 m High tsunamis Swept Away nearby populations and so much gas and
Ash were released the global temperatures cooled by nearly 0.5° C red Dusty sunsets followed for many years at vii7 we get super colossal eruptions Millennium defining events that human civilization has only encountered a handful of times Mount tamboro was a 4,300 m high mountain until it exploded in 1815 and released 400 times more energy than the tar bomber 140 billion tons of Ash and dust was shot halfway to space before smothering the world's skies turning them a sickly yellow there was no summer the following year crops died and over a 100,000 people perished this is
the Dreadful potential of volcanic eruptions with famines across the other side of the world and even centuries Long Cold periods being attributed to them okay but what's a super volcano the term super volcano is a meteor invention and not a scientific term the main issue with them is that not every eruption from a super volcano is a super eruption what makes super volcanoes special is that they've been waiting to erupt for hundreds of thousands of years pressure buil up in colossal magma reservoirs several kilometers deep until it becomes strong enough to lift the rock Above
It by several meters rocks crack under the pressure until they finally give way and billions of tons of gas and Ash blast out at supersonic speed an insane explosion of at least 1,000 cubic km that impacts every corner of the globe and yet that is only a small portion of the magma Reservoir super eruptions are like a Boiling Pot of water popping its lid off and spitting a bit off the top afterwards the ground collapses into the void Left Behind forming a hole called a Caldera under this Caldera pressure starts building again until the volcano
gathers enough energy for another Super eruption but this could take hundreds of thousands of years it's estimated that one of the few volcanoes capable of super eruptions on Earth could cause a catastrophic eruption every 177,000 years on average that would make them far more frequent than comparable asteroid impacts the most recent super eruption is the orui eruption 26,500 years ago in New Zealand with the force of dozens of billions of tons of TNT a Mount Everest sized pile of explosives a huge portion of the landscape was scooped out and thrown into the atmosphere left behind
a Caldera spanning 20 km and it caused the entire southern hemisphere to undergo a period of abrupt cooling though among super eruptions it's a mere Firework the lake Tober eruption of 74,000 years ago was a much more significant turning point in history it released a gargantuan 5,300 Cub km of material enough to blanket parts of South Asia in 15 cm of Ash and trigger a rapid 4° C drop in global temperatures it's possible that the volcanic winter lasted 10 years followed by worldwide droughts for centuries Earth's climate might have not recovered for a thousand years
the largest volcanic events we know of were not really huge explosions but floods of millions of cubic kilm of lava the grand finale with a Siberian traps around 250 million years ago a continuous release of lava for 2 million years they raised the ocean temperatures to over 40° C which caused the permium Triassic Extinction killing over 90% of all species Earth's surface needed 9 million years to recover these sorts of eruptions don't change the climate they are the climate but thankfully we haven't seen anything even remotely close to that scale in many millions of years
so should you be scared of super volcanoes definitely not they've been used to frighten many people and are overhyped as an unavoidable apocalypse the most famous One Yellowstone will erupt again but they will be relatively small eruptions natural disasters for sure but not enough to devastate the us or come close to ending Humanity the chance of a vi8 eruption in the next few hundred years is less than 2% and more importantly it wouldn't come as a sudden surprise however less powerful but more frequent eruptions can also do serious damage to our civilizations and are in
many way ways a much greater concern so we must watch for slow changes in magma reservoirs like ground swelling and temperature increases to get an early warning that can save the lives of people living the closest to a volcano and there's time to develop solutions that can remove sulfur and Ash from the stratosphere to eliminate the root cause of the climate disruption we've seen from previous eruptions who knows maybe we'll even be able to turn this force of Destruction into an agent for Good by exploiting the geotherm energy held in their giant magma reservoirs we've
done this work for so many other disasters and we are already doing things we could only have dreamed about decades ago like sending a probe to perform our first asteroid redirection test with determination Humanity really can solve anything so while deep below us an angry hell is churning and waiting for its moment you can sleep well tonight
