The signs of impending doom may be happening now, under the soil of the United States. The super volcanoes may have monstrous eruptions, never witnessed by modern humans. His power of destruction is unbelievable and now scientists estimate that we can be under the deadly threat much sooner than imagined.
The news is particularly bad for the United States, where a super volcano is said to be latent under the Yellowstone National Park. If it erupts 2/3 of the country would be completely uninhabitable.
Experts estimate that super volcanoes erupt with magma accumulation of thousands of years, but a new research shows that this can occur in a few hundred. Super Volcanoes are powered by gigantic underground magma “pools”. Geologists estimated that eruptions of such magnitude occur only between 100,000 and 200,000 years ago, where one of these “pools” could create enough pressure to cause an explosion.
However a new study suggests that the giant magma bodies may exist a few hundred years before exploding. A magma reservoir located six kilometers beneath Yellowstone is growing at a record rate since 2004. Yelowstone a region known as Wyoming park lies on top of a huge amount of molten rock from 640 km below the surface, up to 48 km, which extends underground floor, increasing its extension to incredible 300 km in diameter.
Magna portions may occasionally suffer pressure and rise further in a place known as Yellowstone Caldera. Resembling with the lid of a pot, one of the craters was formed 600,000 years. Scientists believe that the American super volcano has erupted three times in the last 2 million years and estimate that this may happen again soon. If the Yellowstone super volcano to erupt, the explosion will be 1,000 times more powerful than occurred in 1980 at Mount St. Helens.
The new study was based on analysis of a super-eruption that occurred in eastern California 760,000 years ago. Several independent lines of evidence indicated that the magma pool erupted within a few thousand years, perhaps within a few hundred years, covering half the North American continent with smouldering ash.
The scientists based their estimate on quartz crystallisation rates. Previous studies have relied on the growth of zircon crystals, which is said to be a less accurate method. Lead scientist Dr Guilherme Gualda, from Vanderbilt University in Nashville, Tennessee, said: ‘Our study suggests that when these exceptionally large magma pools form they are ephemeral and cannot exist very long without erupting.
‘The fact that the process of magma body formation occurs in historical time, instead of geological time, completely changes the nature of the problem.’ He said regions such as Yellowstone should be monitored regularly to provide advance warning of a catastrophic super-eruption.
Fabio Evagelista is a Brazilian writer.
Crossed Paths is the first book of the Myra-Hati trilogy, an epic adventure in a post-apocalyptic world, for the lovers of sci-fi / fantasy genre. This is the author’s first work published in America.