Yellowstone Massive Ground Swell Begins

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PostFri Jan 21, 2011 10:15 pm » by Savwafair2012


Yellowstone National Park's supervolcano just took a deep "breath," causing miles of ground to rise dramatically, scientists report.



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Yellowstone Has Bulged as Magma Pocket Swells


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Yellowstone National Park's supervolcano just took a deep "breath," causing miles of ground to rise dramatically, scientists report.

The simmering volcano has produced major eruptions—each a thousand times more powerful than Mount St. Helens's 1980 eruption—three times in the past 2.1 million years. Yellowstone's caldera, which covers a 25- by 37-mile (40- by 60-kilometer) swath of Wyoming, is an ancient crater formed after the last big blast, some 640,000 years ago.

(See "When Yellowstone Explodes" in National Geographic magazine.)

Since then, about 30 smaller eruptions—including one as recent as 70,000 years ago—have filled the caldera with lava and ash, producing the relatively flat landscape we see today.

But beginning in 2004, scientists saw the ground above the caldera rise upward at rates as high as 2.8 inches (7 centimeters) a year. (Related: "Yellowstone Is Rising on Swollen 'Supervolcano.'")

The rate slowed between 2007 and 2010 to a centimeter a year or less. Still, since the start of the swelling, ground levels over the volcano have been raised by as much as 10 inches (25 centimeters) in places.

"It's an extraordinary uplift, because it covers such a large area and the rates are so high," said the University of Utah's Bob Smith, a longtime expert in Yellowstone's volcanism.

Scientists think a swelling magma reservoir four to six miles (seven to ten kilometers) below the surface is driving the uplift. Fortunately, the surge doesn't seem to herald an imminent catastrophe, Smith said. (Related: "Under Yellowstone, Magma Pocket 20 Percent Larger Than Thought.")

"At the beginning we were concerned it could be leading up to an eruption," said Smith, who co-authored a paper on the surge published in the December 3, 2010, edition of Geophysical Research Letters.

"But once we saw [the magma] was at a depth of ten kilometers, we weren't so concerned. If it had been at depths of two or three kilometers [one or two miles], we'd have been a lot more concerned."

Studies of the surge, he added, may offer valuable clues about what's going on in the volcano's subterranean plumbing, which may eventually help scientists predict when Yellowstone's next volcanic "burp" will break out.

Yellowstone Takes Regular Breaths

Smith and colleagues at the U.S. Geological Survey (USGS) Yellowstone Volcano Observatory have been mapping the caldera's rise and fall using tools such as global positioning systems (GPS) and interferometric synthetic aperture radar (InSAR), which gives ground-deformation measurements.

Ground deformation can suggest that magma is moving toward the surface before an eruption: The flanks of Mount St. Helens, for example, swelled dramatically in the months before its 1980 explosion. (See pictures of Mount St. Helens before and after the blast.)

But there are also many examples, including the Yellowstone supervolcano, where it appears the ground has risen and fallen for thousands of years without an eruption.

According to current theory, Yellowstone's magma reservoir is fed by a plume of hot rock surging upward from Earth's mantle. (Related: "New Magma Layer Found Deep in Earth's Mantle?")

When the amount of magma flowing into the chamber increases, the reservoir swells like a lung and the surface above expands upward. Models suggest that during the recent uplift, the reservoir was filling with 0.02 cubic miles (0.1 cubic kilometer) of magma a year.

When the rate of increase slows, the theory goes, the magma likely moves off horizontally to solidify and cool, allowing the surface to settle back down.

Based on geologic evidence, Yellowstone has probably seen a continuous cycle of inflation and deflation over the past 15,000 years, and the cycle will likely continue, Smith said.

Surveys show, for example, that the caldera rose some 7 inches (18 centimeters) between 1976 and 1984 before dropping back about 5.5 inches (14 centimeters) over the next decade.

"These calderas tend to go up and down, up and down," he said. "But every once in a while they burp, creating hydrothermal explosions, earthquakes, or—ultimately—they can produce volcanic eruptions."

Yellowstone Surge Also Linked to Geysers, Quakes?

Predicting when an eruption might occur is extremely difficult, in part because the fine details of what's going on under Yellowstone are still undetermined. What's more, continuous records of Yellowstone's activity have been made only since the 1970s—a tiny slice of geologic time—making it hard to draw conclusions.

"Clearly some deep source of magma feeds Yellowstone, and since Yellowstone has erupted in the recent geological past, we know that there is magma at shallower depths too," said Dan Dzurisin, a Yellowstone expert with the USGS Cascades Volcano Observatory in Washington State.

"There has to be magma in the crust, or we wouldn't have all the hydrothermal activity that we have," Dzurisin added. "There is so much heat coming out of Yellowstone right now that if it wasn't being reheated by magma, the whole system would have gone stone cold since the time of the last eruption 70,000 years ago."

The large hydrothermal system just below Yellowstone's surface, which produces many of the park's top tourist attractions, may also play a role in ground swelling, Dzurisin said, though no one is sure to what extent.

"Could it be that some uplift is caused not by new magma coming in but by the hydrothermal system sealing itself up and pressurizing?" he asked. "And then it subsides when it springs a leak and depressurizes? These details are difficult."

And it's not a matter of simply watching the ground rise and fall. Different areas may move in different directions and be interconnected in unknown ways, reflecting the as yet unmapped network of volcanic and hydrothermal plumbing.

The roughly 3,000 earthquakes in Yellowstone each year may offer even more clues about the relationship between ground uplift and the magma chamber.

For example, between December 26, 2008, and January 8, 2009, some 900 earthquakes occurred in the area around Yellowstone Lake.

This earthquake "swarm" may have helped to release pressure on the magma reservoir by allowing fluids to escape, and this may have slowed the rate of uplift, the University of Utah's Smith said. (Related: "Mysterious 'Swarm' of Quakes Strikes Oregon Waters.")

"Big quakes [can have] a relationship to uplift and deformations caused by the intrusion of magma," he said. "How those intrusions stress the adjacent faults, or how the faults might transmit stress to the magma system, is a really important new area of study."

Overall, USGS's Dzurisin added, "the story of Yellowstone deformation has gotten more complex as we've had better and better technologies to study it."

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http://news.nationalgeographic.com/news ... a-science/
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PostFri Jan 21, 2011 10:22 pm » by Megame23


2012! COMING SOON TO A PLANET YOU'RE ON:


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:lol:


Really though, its pretty messed up, 10 inches! Very bad if true! Nothing we can do about it though, global catastrophe is out of our hands. But if the world is going to end mega disasters would be a pretty cool way to see it go, rather than the NWO massacring everyone. But we may be able to stop that one, so I choose to focus on them rather than these sorts of things.
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PostFri Jan 21, 2011 10:24 pm » by Shaggietrip


Here is a great video of the Super Volcano in Yellowstone.


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PostFri Jan 21, 2011 10:59 pm » by SUKHOV


Awesome Video! :clapper: Seems all the most beautiful places in the world are also the most dangerous. thank you.

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PostFri Jan 21, 2011 11:24 pm » by Seahawk


This is the kind of thing that really blows my day.

Seriously, though, the way these volcanoes are connected under Yellowstone, and the size of them are what makes me pretty damn nervous. I mean, there's no theorizing here. It's real and true fact. This could really wreak havoc as we have never known in our life times. Considering the latest data on the very real pole shift that is occurring at the moment, I was just waiting for this. Can you say plate tectonics? I knew you could.


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PostSat Jan 22, 2011 12:17 am » by The57ironman


do we "really" "really" "really" know how dire the circumstances are , regarding the size of that intrusion zone ?

..........i didn't think so.......i only know what we're told

i'm always the cynic , so these statements below disturb me , considering the fiasco in the gulf
( a great big pile of steamy horsesh*t ) no matter where you stand with that , there aren't any university scientists standing up for righteousness (again ... imo) with respect to the safety of the public ....and now birds dropping from the sky , flu vaccinations , chemtrails ,etc etc you know . ......................there's no statements from any of those c*cksuckers about true science there , is there ? nothing , nothing , nothing mainstream .(we're shrooms)

................thousand times more powerful
.............one as recent as 70,000 years ago
...............20 Percent Larger Than Thought
.............clues about what's going on
...........risen and fallen for thousands of years without an eruption

dont tell me how old a f*ckin' dinosaur is with a theory :badair:
....same thing with any carbon dating ...theory

i don't trust nasa and i don't trust any other scientific agency :lol: putting out info , to/for the masses....


ok .....i'm done ... i had to let that out for a while now :mrcool:

but i would love to see this scenario ruin the day for kissinger , bill gates and monsanto.....

i'm waiting for disclosure :alien51: :alien51: :alien51: :alien51: :alien51: :alien51:

or the rapture :pray: :pray: :pray:

or the apocalypse :ohno: :ohno: :ohno:

or armeggedon :nails: :nails: :nails:

i am glad , however , that sav :flop: pays attention for the lot of us :hugging:

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PostSat Jan 22, 2011 12:24 am » by Slith


Yellowstone.... Blow me! but just not away hehe. Ya dangerous indeed
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PostSat Jan 22, 2011 12:24 am » by Boondox681


this thing is right in my neck of the woods.
if it blows i'd consider myself lucky.it would be quick and painless here in denver.
the aftermath would be biblical.

peace.
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PostSat Jan 22, 2011 12:25 am » by Slith


And where's Yogi and BooBoo. Oh sorry, wrong park :mrgreen:
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PostSat Jan 22, 2011 12:36 am » by Illuminated


-
some say (below) if it went off it would kick up so much ash we'd have a decade long Nuclear winter, like the movie 'the road'

:cry: :nails:


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