Yellowstone Supervolcano Getting Ready To Blow Full (Photo & Video)
Thursday, October 29, 2015 17:53
It could release 1 ft layer of molten ash 1,000 miles from the National Park
It would be 1,000 times as powerful as the 1980 Mount St Helens eruption
A haze would drap over the United States, causing temperatures to drop
Experts say there is a 1 in 700,000 annual chance of a eruption at the site
A supervolcano in the heart of America’s northwest has the potential to blanket the US in a ‘nuclear winter’.
If it were to erupt, the Yellowstone supervolcano would be one thousand times as powerful as the 1980 Mount St Helens eruption, experts claim.
While it has lain dormant for more than 70,000 years, scientists say that we can’t rule out the possibility eruption this may some day take place – although they say the chances are extremely slim.
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The Grand Prismatic hot spring in Yellowstone National Park is among the park’s many hydrothermal features created by the Yellowstone supervolcano. Experts say there is a one in 700,000 annual chance of a volcanic eruption.
The volcano at Yellowstone National Park in Wyoming and Montana sits atop ahuge reserve of molten rock and last erupted 640,000 years ago.
It is one of the largest active continental silicic volcanic fields in the world. Silicic is used to describe magma or igneous rock rich in silica.
An in-depth report by How Stuff Works has revealed the process that would take place if the volcano were to blow.
It says that a mixture of magma, rocks, vapour, carbon dioxide and other gases would eventually push out from the ground, creating a dome shape with cracks.
The dissolved gases would them explode, releasing the magmaacross the park.
Pictured is an artist’s impression
The eruption, the say, could kill as many as 90,000 people almost instantly and release a 10 ft (3-meter) layer of molten ash 1,000 miles (1,609km) from the park.
‘The ash would block off all points of entry from the ground, and the spread of ash and gases into the atmosphere would stop most air travel, just as it did when a much smaller volcano erupted in Iceland in 2010,’ the magazine writes.
‘Sulphuric gases released from the volcano would spring into the atmosphere and mix with the planet’s water vapour.
‘The haze of gas that could drape the country wouldn’t just dim the sunlight — it also would cool temperatures.’
SCIENTISTS FIND MASSIVE NEW MAGMA CHAMBER UNDER YELLOWSTONE
Previous research found a relatively small magma chamber, known as the upper-crustal magma reservoir, beneath the surface
In the heart of Yellowstone National Park, a supervolcano releases around 45,000 metric tonnes of carbon dioxide each day.
But the magma chamber lying directly beneath its surface is not considered large enough to produce such levels, so researchers have been searching for an alternative source for years.
In April, by tracking seismic waves, geophysicists discovered a huge secondary chamber deeper underground that’s so large its partly-molten rock could fill the Grand Canyon 11 times over.
Previous research found a relatively small magma chamber, known as the upper-crustal magma reservoir, directly beneath the surface in 2013 that measures 2,500 cubic miles (10,420 cubic km).
To discover the latest chamber, Hsin-Hua Huang from the University of Utah and his colleagues tracked seismic waves from almost 5,000 earthquakes.
These readings combined data from the University of Utah Seismograph Stations, which collected shallow readings from nearby quakes in Utah, Idaho, the Teton Range and Yellowstone, and from the Earthscope array, which revealed deeper readings from temblors from more further afield.
Each of these quakes created waves that echoed around the supervolcano.
The movement and structure of these waves could then be used to map the earth beneath.
The researchers said in their paper: ‘The Yellowstone magmatic system from the mantle plume to the upper crust’, published in the journal Science, that the reservoir contains around 98 per cent hot rock.
The remaining 2 per cent is molten rock and is too deep to directly cause an eruption, they added.
Huge magma chamber discovered beneath Yellowstone National Park
It adds that falling temperatures would damage our food supply, destroying crops and causing a worldwide food shortage.
But not every believes a Yellowstone eruption would be as catastrophic as this.
Last year, a study by the United States Geological Survey (USGS) concluded that a volcanic eruption at Yellowstone would cover cities across the country with ash and shut down air travel and communications.
But it added that it would not herald the end of the United States as we know it, as the latest report has claimed.
The scientists used the program called Ash 3D to model the effects of a Yellowstone ‘super eruption’ and found that cities up to 300 miles from the park would be covered by up to three feet of ash.
Cities further afield in the Midwest would be covered by a few inches and coastal cities such as New York and California would get only a fraction of an inch.
Yellowstone National Park spans the midwestern US states of Wyoming, Idaho and Montana (pictured)
An eruption at Yellowstone would create an ‘umbrella cloud of ash which would expand evenly in all directions driven by the force of the seismic event.
‘In essence, the eruption makes its own winds that can overcome the prevailing westerlies, which normally dominate weather patterns in the US,’ said Larry Mastin, the lead author of the new paper.
The USGS study says that electronic communication and air travel throughout the country would be shut down by an eruption.
A huge cloud of ash thousands of miles across would also likely cause a year-long winter, say the study authors.
The 1815 eruption of Mount Tambora in the Pacific produced an ash cloud tens of miles across caused ‘a year without a summer’ across the globe with snowfall in the North Eastern United States in June.
Areas covered in feet of ash would see buildings at risk of collapse and sewer and water lines blocked, and winds would form large dunes of ash that would cover roads and buildings.
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If i were to erupt, the Yellowstone supervolcano would be one thousand times as powerful as the 1980 Mount St Helens eruption, experts claim. The volcano at Yellowstone National Park in Wyoming and Montana sits atop a huge reserve of molten rock and last erupted 640,000 years ago.
Farming in the Midwest would be devastated by the cloud of ash, and highways across the country would become slippy and treacherous.
The Yellowstone volcano has had three super eruptions – which produce more than 240 cubic miles of ash’ in the past.
One was 2.1 million years ago, another 1.3 million years ago and a third 640,000 years ago.
The last volcanic activity at Yellowstone was 70,000 years ago which produced a lava flow in the south of the park.
In April, scientists at the University of Utah discovered an enormous secondary chamber deeper beneath Yellowstone National Park that’s so large it is partly-molten rock could fill the Grand Canyon 11 times over.
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