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Super Volcano In Yellowstone National Park
solcomhouse ^ | Unknown

Posted on 05/14/2002 8:35:23 AM PDT by Junior

It is little known that lying underneath one of America's areas of outstanding natural beauty - Yellowstone Park - is one of the largest super volcanoes in the world. Scientists have revealed that it has been on a regular eruption cycle of 600,000 years. The last eruption was 640,000 years ago…so the next is overdue. The next eruption could be 2,500 times the size of the 1980 Mount St. Helens eruption.

And the sleeping giant is breathing: volcanologists have been tracking the movement of magma under the park and have calculated that in parts of Yellowstone the ground has risen over seventy centimeters this century.

Normal volcanoes are formed by a column of magma - molten rock - rising from deep within the Earth, erupting on the surface, and hardening in layers down the sides. This forms the familiar cone shaped mountain we associate with volcanoes. 

Supervolcanoes, however, begin life when magma rises from the mantle to create a boiling reservoir in the Earth's crust. This chamber increases to an enormous size, building up colossal pressure until it finally erupts. The explosion would send ash, dust, and sulfur dioxide into the atmosphere, reflecting the sun's rays and creating a cold wave lasting several years. Crops in many areas would fail and many species of animals and plants would face extinction.

The most recent caldera-forming eruption about 650,000 years ago produced a caldera 53 x 28 miles (85 x 45 kilometers) across in what is now Yellowstone National Park (Figure 2). During that eruption, ground-hugging flows of hot volcanic ash, pumice, and gases swept across an area of more than 3,000 square miles. When these enormous pyroclastic flows finally stopped, they solidified to form a layer of rock called the Lava Creek Tuff. Its volume was about 240 cubic miles (1,000 cubic kilometers), enough material to cover Wyoming with a layer 13 feet thick or the entire conterminous United States with a layer 5 inches thick. The Lava Creek Tuff has been exposed by erosion at Tuff Cliff, a popular Yellowstone attraction along the lower Gibbon River.

The eruption also shot a column of volcanic ash and gases high into Earth's stratosphere. This volcanic cloud circled the globe many times and affected Earth's climate by reducing the intensity of solar radiation reaching the lower atmosphere and surface. Fine volcanic ash that fell downwind from the eruption site blanketed much of North America. This ash layer is still preserved in deposits as far away as Iowa, where it is a few inches thick, and the Gulf of Mexico, where it is recognizable in drill cores from the sea floor. Lava flows have since buried and obscured most of the caldera, but the underlying processes responsible for Yellowstone's tremendous volcanic eruptions are still at work.

 

TINY CRYSTALS PREDICT A HUGE VOLCANO IN WESTERN U.S.

Press Release

MADISON - Reading the geochemical fine print found in tiny crystals of the minerals zircon and quartz, scientists are forming a new picture of the life history - and a geologic timetable - of a type of volcano in the western United States capable of dramatically altering climate sometime within the next 100,000 years.

With insight gained from new analytical techniques to study crystals of zircon and quartz, minerals that serve as veritable time capsules of geologic events, a group of scientists from the University of Wisconsin-Madison has proposed a new model for the origin of volcanism in young calderas.

These are volcanoes that occur over "hot spots" in the Earth and they erupt every few hundred thousand years in catastrophic explosions, sending hundreds to thousands of cubic kilometers of ash into the atmosphere and wreaking climatic havoc on a global scale.

In a series of papers, UW-Madison geologists Ilya N. Bindeman and John W. Valley present a life history of the hot spot volcanism that has occurred in the Yellowstone basin of the western United States over the past 2 million years. Their findings suggest a dying, but still potent cycle of volcanism, and a high probability of a future catastrophic eruption sometime within the next million years, and possibly within the next hundred thousand years.

Today's Yellowstone landscape represents the last in a sequence of calderas - the broad crater-like basins created when volcanoes explode and their characteristic cones collapse - that formed in regular progression over the past 2 million years. The near-clockwork timing of eruptions there - 2 million years ago, 1.3 million years ago and 600,000 years ago - suggests a pattern that may foreshadow an eruption of catastrophic proportions, said Bindeman and Valley.

Beneath Yellowstone and its spectacular landscape of hot springs and geysers is a hot spot, an upwelling plume of melted rock from the Earth's mantle. As the plume of hot, liquid rock rises in the Earth, it melts the Earth's crust and creates large magma chambers.

"These magmas usually erupt in a very catastrophic way," said Bindeman. "By comparison, the eruption of Mount St. Helens sent about two cubic kilometers of ash into the atmosphere. These catastrophic types of eruptions send thousands of cubic kilometers of ash skyward."

The hot spot deep beneath Yellowstone acts like a burner, said Bindeman. "It's a constant source of heat that acts on the upper crust and forms magma chambers that contain tens of thousands of cubic kilometers" of molten rock.

One of the massive plates that helps make up the crust of the Earth, the North American plate, is slowly moving over the hot spot, said Bindeman. "The plate has been moving across the heat source which makes it seem like the volcanoes are moving across the continent. Moreover, we have a progression of explosive eruptions which seem to have some periodicity."

Bindeman and Valley studied rocks that span the entire 2-million-year long eruptive sequence at Yellowstone with a special emphasis on lavas that erupted the last time one of the massive volcanoes popped off creating what geologists call the Yellowstone Caldera. Their conclusion is that the volcanic cycle is waning, but that there is still a very real potential of an eruption of massive proportions sometime in the near geologic future.

A cross section of a quartz crystal obtained from rocks near Yellowstone. Crystals of quartz and zircon harbor geochemical clues to past -- and future -- volcanic eruptions in the Yellowstone caldera. In the past, eruptions over this "hot spot" in the Earth have been of a magnitude that would have severely altered Earth's climate.
Image credit: Ilya Bindeman and John Fournelle, remastered in Adobe Illustrator by Mary Diman

Such an eruption would disrupt global climate by injecting millions of tons of ash into the atmosphere. Some of the ash would remain in the atmosphere for years, reflect sunlight back into space and cool the planet, significantly affecting life. In addition, a blanket of ash over a meter thick would be deposited in nearby regions and effectively smother life there.

The most recent caldera is 600,000 years old and encompasses an area of more than 2,000 square kilometers. When it erupted, it blasted 1,000 cubic kilometers of volcanic rock into the atmosphere and it settled as ash over more than half of the United States.

After that last major eruption, volcanism in Yellowstone continued in a quieter fashion with another, much smaller eruption occurring 70,000 years ago.

Old Faithful Geyser Yellowstone National Park

http://www.nps.gov/yell/oldfaithfulcam.htm

Today's spectacular geysers and hot springs at Yellowstone are the most visible part of the volcanic system there. They contain heated snow and rainwater which leave a geochemical record that provides insight into the region's geologic activity. Prior to the last catastrophic eruption at Yellowstone 600,000 years ago, an even more spectacular geothermal landscape existed there, said Bindeman.

"The unique thing about Yellowstone is that the volcanic rocks that erupted following the collapse of the big calderas contain up to 50 percent oxygen which was ultimately derived from rain waters," Bindeman said. "The zircon and quartz tell us that rocks near the surface were altered by heated snow and rainwater. These rocks were then remelted to become magmas."

This scenario changes the view of magmatism at Yellowstone and other calderas as representing new magma coming from deep in the Earth. On the contrary, Bindeman and Valley make a case for the total remelting and recycling of previously erupted surface rocks.

Their findings have been published in a series of papers, the first in the August 2000 edition of the journal Geology. Another paper is to appear this month (July) in Earth and Planetary Science Letters, and another is scheduled for publication next month (August) in the Journal of Petrology.


TOPICS: Miscellaneous; US: Wyoming
KEYWORDS: catastrophism; crevolist; supervolcano; techindex; yellowstone
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ITEOTWAWKI...
1 posted on 05/14/2002 8:35:23 AM PDT by Junior
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To: Junior
You got MY attention...Interesting post.

sw

2 posted on 05/14/2002 8:39:41 AM PDT by spectre
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To: Junior
Somebody better call PETA and ELF to put an end to this. Hey, I know, Al Gore isn't doing much these days and his El Nino battles are behind him....
3 posted on 05/14/2002 8:40:36 AM PDT by TADSLOS
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To: Junior
Cancelling planned visit to Yellowstone this summer.

It's 40,000 years overdue, for cripe's sake!

4 posted on 05/14/2002 8:41:01 AM PDT by Ken H
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To: Junior
Tinfoil spelunking helmet alert...
5 posted on 05/14/2002 8:41:15 AM PDT by pabianice
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To: spectre
I caught a show on Discovery Channel this weekend dealing with this subject and I just had to go and find out more on it. Of course, they also had a show on megatsunamis ...
6 posted on 05/14/2002 8:42:47 AM PDT by Junior
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To: Junior
Great Article. As with an atomic bomb attack, if the results of an eruption are truly this bad, I want to be visting Yellowstone when it goes off...lol.
7 posted on 05/14/2002 8:43:18 AM PDT by txzman
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To: pabianice
No tinfoil involved. This is real stuff, not whacked out conspiracy theories. Of course, an asbestos helmet might be appropriate ...
8 posted on 05/14/2002 8:43:53 AM PDT by Junior
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To: TADSLOS
in parts of Yellowstone the ground has risen over seventy centimeters this century.

It is all the people on both coasts. Their weight is causing the edges of America to droop and the center to rise.

9 posted on 05/14/2002 8:44:51 AM PDT by LarryLied
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To: Junior
We're all gonna die!!
10 posted on 05/14/2002 8:47:00 AM PDT by machman
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To: pabianice
Right after Mt. St. Helens exploded, two DJs on a Boston radio station pulled a prank. They started broadcasting "bulletins" that the local Blue Hills ski area was erupting. Blue Hills is a small hill of about 2,000 feet near Norwood-Boston. It has zero volcanic properties. Yet, hundreds of thousands of Boston's stupid-but-over-educated tree-huggers and ozone-hole watchers heard the joke, took it seriously, and freaked out. The roads were clogged with accidents by paniced drivers who had thrown their families and a few suitcases in their cars and were barreling down the highway to escape the "raining death" from the "volcano." It took days to get things back to normal. The DJs were fired. The radio station apologized.
11 posted on 05/14/2002 8:47:00 AM PDT by pabianice
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To: Junior
As an acronym neophyte, I'll ask the dumb question. What does ITEOTWAWKI mean?
12 posted on 05/14/2002 8:47:36 AM PDT by det dweller too
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To: Ken H
Don't cancel. I visited Yellowstone on my honeymoon and had an enjoyable stay at the Roosevelt Lodge. Saw Old Faithful too.
13 posted on 05/14/2002 8:48:01 AM PDT by Young Werther
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To: det dweller too
It's The End of the World as We Know It. (Sorta tongue-in-cheek).
14 posted on 05/14/2002 8:48:50 AM PDT by Junior
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To: Junior
Cool. If it explodes, we'll be wearing winter clothes all year.
15 posted on 05/14/2002 8:49:54 AM PDT by Ciexyz
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To: Ciexyz
And doing without crops.
16 posted on 05/14/2002 8:53:12 AM PDT by Jerrybob
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To: Junior
Cool!

Anyone ever wonder if another Harry Truman (of Mt St Helens fame) were living in the area, would the feds lay siege to his home and arrest him if he refused to flee an impending disaster?

17 posted on 05/14/2002 8:55:28 AM PDT by El Sordo
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To: Junior
Well, it would sure solve the "global warming" problem for a few thousand years.
18 posted on 05/14/2002 8:56:47 AM PDT by colorado tanker
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To: Junior
We have been to Yellowstone a number of times. When you're heading towards the North entrance there is an overlook on one of the mountains that shows the entire caldera, and there is a display there showing the size of the area. When you have driven through it you can truly appreciate the considerable dimensions of it.

It is facinating to fish the rivers and see the many vents that are literally everywhere. It boggles my mind to think how massive this eruption will be when it finally occurs.

I'm not gonna lose any sleep over it though.

19 posted on 05/14/2002 8:57:25 AM PDT by TroutStalker
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To: Junior
. . . a cold wave lasting several years . . .

Better kick in that global warming, and QUICK!

20 posted on 05/14/2002 8:59:24 AM PDT by Andyman
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To: El Sordo
Old Harry Truman is now a fossil, that is if he was'nt evaporated in the blast.
21 posted on 05/14/2002 9:02:00 AM PDT by Rebelbase
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To: Junior
Cool stuff! Of course "in the next hundred thousand years" means that it could affect me or my kids, which would be awful.

More likely, it will affect my great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-great-grandchildren, and I really don't know them. They might be total jerks for all I know.

22 posted on 05/14/2002 9:15:20 AM PDT by dead
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To: Junior
Oh, why don't you just go hug a tree. Nature cares for us after all and the Earth will always turn round. (Sarcasm)
23 posted on 05/14/2002 9:18:45 AM PDT by lavaroise
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To: TroutStalker
Exactly. It's happened before, will happen again, and sounds roughly equivalent to another Krakatoa explosion.

I wouldn't want to be within several hundred miles of it, when it blows. The recent 70-cm rise is disturbing, hinting at "sooner" rather than "later", from what I can recall of my vulcanolgy course (back in the early 1980's). But "Soon" in geologic terms can mean anywhere from 5 seconds from now to several thousand years from now. . . .

24 posted on 05/14/2002 9:20:20 AM PDT by Salgak
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To: crevo_list
This one might give the YEC the willies ...
25 posted on 05/14/2002 9:21:20 AM PDT by Junior
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To: Junior
I saw the Discovery Channel show about this as well. The cycle is not exactly 600K years. It has gone off from 600,000 - 700,000 years intervals for the past 3 eruptions that we know of.

Granted, it's going to blow up but I wouldn't be canceling any planned trips there for the next 10,000 years.

26 posted on 05/14/2002 9:28:48 AM PDT by SengirV
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To: Salgak
Exactly. It's happened before, will happen again, and sounds roughly equivalent to another Krakatoa explosion.

Would make Krakatoa look like a complete joke...hundreds or thousands of times more material ejected and explosive power. There hasn't been a caldera blast like Yellowstone, or remotely approaching Yellowstone, in recorded human history.

27 posted on 05/14/2002 9:33:23 AM PDT by John H K
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To: Salgak
I wonder if, by drilling into it we could simultainiously relieve pressure, and generate electricity via the geothermal heat ?
28 posted on 05/14/2002 9:37:33 AM PDT by SauronOfMordor
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To: Junior
I was in Yellowstone during the 1959 earthquake. Things were a rockin' and a rollin'.
29 posted on 05/14/2002 9:41:22 AM PDT by stripes1776
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To: Junior
Here's another one:

New research proves existence of super volcano beneath Loch Ness

Professor Tom Plume PhD (51) of the EU Volcanic Research Committee has warned that the famous fault-line, known as the Great Glen, may be about to rip apart as a result of a Super Volcano, which has lain dormant for millions of years.

Fist sized plankton"Loch Ness lies on the Great Glen fault-line and its incredible depth (over 2km) has severely hampered our research project", said Professor Plume. Unlike some other projects, we need to be able to see right down through the earth's crust, but until recently, we have been restricted to dry land. Fortunately new developments with satellite laser topography sonar side-scanning techniques have enabled us to penetrate through the thick sludge that lies up to 400m thick at the loch's bottom. What we found shocked us: nematode worms and zooplankton the size of a human fist that seem to be feeding on thermal vents."

Ironically it was the discovery of the sulphur-feeding creatures that prompted Professor Plume to hire a special robot submarine capable of dropping through a thermal vent and searching beyond. "We found a very active thermal rupture in the sub-base of the loch", said Professor Plume, "further sonar probing showed large lava-filled caverns and pressure readings suggest that a major volcanic event may be about to occur. Tremors have been felt recently in parts of the Highlands of Scotland and it is understood that small seismic shocks often precipitate a major or catastrophic eartchquake or volcanic eruption."

For now, however, this fascinating Loch Ness research project continues to probe its bottom. Professor Plume cautiously suggests that Nessie may have managed to survive the ice age by swimming around the warm volcanic vents and feeding on the monster sized sulphur feeding worms and plankton. The volcano may be a relic from the time this area was part of the super-sized continent Pangea.

"It's just a theory", he said, "but our research has shown that Loch Ness still holds some incredible mysteries and there is little sign that they will be solved in the near future."

The Highlands of Scotland Tourist Board (HOST) was unavailable for comment at the time of going to press.

30 posted on 05/14/2002 9:42:54 AM PDT by Junior
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To: Junior
This one almost spelled the end for humanity:

SUPER VOLCANO TOBA
 
Their is substantial evidence to show that within the time of the super volcano Toba's eruption in the Indonesian Pacific, the world's population of homo sapiens decreased from over one hundred thousand to less than two thousand, basically because global temperatures dropped five degrees for many years.  This was within the current interglacial and at its start.
 
Toba, Indonesia, 75,000 years ago:
 The eruption of 2,800 cubic km of magma at Toba caldera 75,000 years ago was the largest eruption in the last 2 million years. The eruption may have release as much as 1012 kg of sulfuric acid, an order of magnitude more than Laki in 1783 and Tambora in 1815, two of the greatest Holocene eruptions. The Toba eruption may have caused about 3 to 4 degree C cooling at the surface but this impact is hard to detect because of concurrent glacial conditions (Sigurdsson, 1990).
   
31 posted on 05/14/2002 9:46:59 AM PDT by Junior
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To: Junior
Someone has been watching the Discovery Channel.
32 posted on 05/14/2002 9:47:42 AM PDT by Deguello
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To: Deguello
Yep. Fascinating, wasn't it?
33 posted on 05/14/2002 9:48:56 AM PDT by Junior
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To: SengirV
if the thing can hold off even a thousand years the technology will be in place to minimize the damage. or they'll just haul everyone off world for awhile as nasa will have put up the space elevator Space Elevator image
34 posted on 05/14/2002 9:54:11 AM PDT by ckilmer
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To: Junior
"Yep. Fascinating, wasn't it?"

I'm hold out for the Dooms Day Meteoroid.

35 posted on 05/14/2002 9:59:25 AM PDT by Deguello
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To: Junior
The south end of Yellowstone Lake is sagging, so that water has flooded areas that were formerly forest. And there are a slew of brand new thermal features up in the region north of Pelican Creek, lots of new hot lakes and such. Now, I certainly hope the good volcano limits itself to such displays for at least another century or so, or even just a decade or two, so I can go back up there again and get a good look before the scenery gets re-arranged. It's such a great place and all, I will really hate to see it go. Still, we can always hope even cooler stuff will show up after the thing blows. I can imagine a Valley of Ten Thousand Smokes only several hundred times larger. It will take a few centuries to replinish the underground water supply of course, but maybe the massive smoke and ash cloud will begin a small ice age in the area, and get some nice glaciers going. Which would be a real need, for the glacial lakes and such are a great part of the park as well.
36 posted on 05/14/2002 10:00:14 AM PDT by Cleburne
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To: Junior
Hmm...perhaps this explains the existence of the waterhorses and other aquatic terrors of Highland lore...
37 posted on 05/14/2002 10:05:00 AM PDT by Cleburne
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To: SengirV
Maybe it plans to just blow off a little steam and then retire.
38 posted on 05/14/2002 10:05:58 AM PDT by TADSLOS
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To: Junior
I think I see. It would be like a geyser except big and blowing out a lot of hot dust and gas. A typical volcanic cone might not form, but the dust would settle over a huge area burying everything several feet deep. Right?
39 posted on 05/14/2002 10:10:00 AM PDT by RightWhale
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To: Junior
And I just settled on a townhouse just north of the park. Oh well.
40 posted on 05/14/2002 10:14:18 AM PDT by smithson
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To: RightWhale
It would dump several hundred cubic kilometers of dust into the air, lowering the world's temperature several degrees. According to the Discovery Channel show, the ash fall was two meters deep 1200 kilometers from the caldera 600,000 years ago.
41 posted on 05/14/2002 10:20:28 AM PDT by Junior
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To: RightWhale
Actually, this post is a little bizarre. I was just thinking about this in response to some other post recently.

People don't realize that one of thinnest known spots of the Earth's crust is in Yellowstone. Pretty much everywhere else the crust is several factors of miles if not order of magnitude of miles deep. However in Yellowstone it is less than a quarter mile thick. It has been determined that ash deposits from the last eruption of the Yellowstone volcano and are indisputably chemically and geologically linked to the Yellowstone eruption have been found on the eastern seaboard (like S.C. & Georgia) with layer thickness of tens of feet.

How's you like them apples?

42 posted on 05/14/2002 10:24:58 AM PDT by raygun
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To: Junior
lowering the world's temperature several degrees

Seems like that would bring on an Ice Age if the blowout is big enough. We missed a summer up here when the Philippines volcano let loose. Lots of snow the next winter as well.

43 posted on 05/14/2002 10:31:44 AM PDT by RightWhale
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To: SengirV
planned trips there for the next 10,000 years

Perhaps I am a bit more conservative than you.

I will NOT go there in 1000 years.

44 posted on 05/14/2002 11:03:26 AM PDT by ninenot
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To: SauronOfMordor
drilling into it

You first.

45 posted on 05/14/2002 11:04:39 AM PDT by ninenot
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To: Salgak
Exactly. It's happened before, will happen again, and sounds roughly equivalent to another Krakatoa explosion. I wouldn't want to be within several hundred miles of it, when it blows. The recent 70-cm rise is disturbing, hinting at "sooner" rather than "later", from what I can recall of my vulcanolgy course (back in the early 1980's). But "Soon" in geologic terms can mean anywhere from 5 seconds from now to several thousand years from now. . . .

Not exactly. Comparing Krakatoa or even Thera to this is what a conventional 500lb bomb would be to a strategic nuclear weapon. Look at the map on the thread. HALF the US would be buried under the pyroclastic flow. This would have major global effect.

I know I know its not likely for our or the forseeable future so I am not getting my panties in a bunch, this is just presented for intellectual curiosity.
46 posted on 05/14/2002 11:22:02 AM PDT by Kozak
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To: Kozak
I know I know its not likely for our or the forseeable future ...

Dunno. Some experts say the eruption is overdue. And the domes under the caldera are expanding ...

47 posted on 05/14/2002 11:43:17 AM PDT by Junior
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To: Junior
If it's gonna blow, I hope is blows before my next VISA card payment goes in the mail!
48 posted on 05/14/2002 11:50:21 AM PDT by Don Carlos
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To: Young Werther
Glad you had an enjoyable time, but you're lucky that thing didn't erupt while you were there!

I've been reading about the big quake in the lower Midwest in the early 1800's along the Meridian-Mississippi fault. We're due for a big one between now and the next few hundred years. I'm getting the hell out of the Midwest ASAP!

I'm looking for a safe place from Mother Nature's wrath.

Looking at Fargo, North Dakota.

49 posted on 05/14/2002 2:30:57 PM PDT by Ken H
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To: Junior
I think at last count there are 7 such supervolcano's dispersed across the globe.

This juxtaposed against the "Save the Planet" bunch makes them look really silly.

I've said it before, and I'll say it again. This planet Earth has been in the past, is now, and will always be a dangerous place, but the alternatives are worse.

50 posted on 05/14/2002 3:41:54 PM PDT by PeaceBeWithYou
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