(http://cdn.newsapi.com.au/image/v1/27ebac60c4ab5831d4fc7830cd942980)
The Grand Prismatic hot spring in Yellowstone National Park, photographed from the air. Picture: istockSource:istock
https://www.msn.com/en-us/video/wonder/yellowstone-super-volcano-a-countdown-on-the-clock/vi-AAwY2gX
Yellowstone super volcano: A countdown on the clock
Duration: 01:43 1 day ago
Multiple earthquakes at Yellowstone National Park followed by the fourth eruption of its usually dormant geyser has sparked speculation about the world's largest super volcano.
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http://www.news.com.au/technology/environment/natural-wonders/quakes-and-eruptions-spark-talks-of-yellowstone-super-volcano/news-story/b1c4804f8e70fc50b6795acdded3e5fe
volcano
A CLUSTER of earthquakes and a usually dormant geyser's fourth eruption has sparked speculation about if the Yellowstone Park super volcano will blow, causing a new ice age.
Candace Sutton
news.com.au MAY 8, 2018 2:03PM
nothing new check the date below
Swarm of over 200 earthquakes detected at Yellowstone supervolcano
https://www.sciencealert.com/swarm-more-200-earthquakes-detected-yellowstone-sup...
Feb 21, 2018 - Regular earthquakes are bad enough. Volcanoes too. But an earthquake swarm at a supervolcano? That really sounds like it could be scary, and scientists say they've just detected such a phenomenon at the site of Yellowstone caldera.
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https://www.express.co.uk/news/science/956757/Yellowstone-volcano-eruption-warning-signs-supervolcano-blast-preparation
Yellowstone volcano eruption WARNING SIGNS: New models give hope for ample preparation
By SEBASTIAN KETTLEY
14:56, Tue, May 8, 2018 | UPDATED: 15:44, Tue, May 8, 2018
The possibility of Yellowstone volcano erupting in the near future remains a palpable threat to the scores of scientists exploring the Yellowstone caldera.
But a recently published study from the University of Illinois suggests humanity would be given ample time to prepare for a mega blast.
According to geology professor Patricia Gregg, new models of regional-scale tectonic stress could give experts enough time to anticipate a catastrophic eruption.
She said: "Traditionally, it is thought that eruptions occur when the pressure caused by hot magma overtakes the strength of a volcano's roof rock.
"But supervolcanoes tend to occur in areas of significant tectonic stress, where plates are moving toward, past or away from each other.
"That plate motion will affect model calculations."
Graduate student Haley Cabaniss and Pomona College geology professor Eric Grosfils presented the findings in the journal Geophysical Research Letters.
The team of researchers created the new models based on earlier eruptions of the Taupo Volcanic Zone in northern New Zealand.
The scientists discovered the effects of tectonic stress play a crucial role in the eruptions of supervolcanoes.
Cabaniss explained: "It does not matter if it is extensional, compressional or shear stress.
"Any tectonic stress will help destabilise rock and trigger eruptions, just on slightly different timescales.
"The remarkable thing we found is that the timing seems to depend not only on tectonic stress but also on whether magma is being actively supplied to the volcano."
more at link
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http://www.foxnews.com/science/2018/05/07/quakes-and-eruptions-spark-talks-yellowstone-super-volcano.html
Have a thread here somewhere on yellowstone showing the actual volcano moves in a patern
sorry didn't look
maybe we need an index instead of a search...
yeah yeah.. i know you think you need a sex- a-tery
when you really need a robot :P
Quote from: space otter on May 10, 2018, 04:25:02 AM
sorry didn't look
maybe we need an index instead of a search...
Front page has new search box type in Yellowstone gets you thread :P Yes a robot would do a sexataary would likely kill me :P
Seems I didn't post the info I was thinking of.
It was recently discovered that volcanoes we once thought were separate, are actauully the same one. The SAME magma bubble but the land moves OVER that bubble and when it comes to a weak or thin spot it pops
(http://img.over-blog-kiwi.com/0/93/55/25/20151120/ob_55f8ce_snakerivermap.jpg)
Now I have to do that all over again
:-\
In the meantime... we also have these
Morning Glory Pool
Yellowstone National Park, USA
http://www.thelivingmoon.com/41pegasus/02files/Yellowstone_Morning_Glory.html
Grand Prismatic Spring
Yellowstone National Park, USA
http://www.thelivingmoon.com/41pegasus/02files/Yellowstone_Grand_Prismatic_Spring.html
Yellowstone Super Volcano
http://www.thelivingmoon.com/41pegasus/02files/Volcanoes_Yellowstone_Park.html
(https://upload.wikimedia.org/wikipedia/commons/8/89/HotspotsSRP_update2013.JPG)
Cool thing about going back to it later is now USGS has the updates "Hot Spot" data on official site...
Questions About Yellowstone Volcanic History
When was the last time there was volcanism at Yellowstone?
The most recent volcanic activity consisted of rhyolitic lava flows that erupted approximately 70,000 years ago. The largest of these flows formed the Pitchstone Plateau in southwestern Yellowstone National Park.
How much volcanic activity has there been at Yellowstone since the most recent giant eruption?
Since the most recent giant caldera-forming eruption, 640,000 years ago, approximately 80 relatively nonexplosive eruptions have occurred. Of these eruptions, at least 27 were rhyolite lava flows in the caldera, 13 were rhyolite lava flows outside the caldera and 40 were basalt vents outside the caldera. Some of the eruptions were approximately the size of the devastating 1991 Pinatubo eruption in the Philippines, and several were much larger. The most recent volcanic eruption at Yellowstone, a lava flow on the Pitchstone Plateau, occurred 70,000 years ago.
How often do volcanic eruptions occur at Yellowstone?
Three extremely large explosive eruptions have occurred at Yellowstone in the past 2.1 million years with a recurrence interval of about 600,000 to 800,000 years. More frequent eruptions of basalt and rhyolite lava flows have occurred before and after the large caldera-forming events. For example, scientists have identified at least 27 different rhyolite lava flows that erupted after the most recent caldera eruptions, about 640,000 years ago, from vents inside the caldera. The most recent was about 70,000 years ago. Many of these eruptions were separated in time by several tens of thousands of years. Because the evidence of earlier eruptions may have been either buried or destroyed, we do not really know how often the volcano has actually erupted.
What was the extent of ash deposition from the largest Yellowstone eruptions?
Map of the known ash-fall boundaries for major eruptions from Long Valley Caldera, Mount St. Helens and Yellowstone.
(https://cdn.images.express.co.uk/img/dynamic/151/590x/secondary/Yellowstone-volcano-eruption-caldera-map-1297010.png)
Map of the known ash-fall boundaries for major eruptions from Long Valley Caldera, Mount St. Helens and Yellowstone.
During the three giant caldera-forming eruptions that occurred between 2.1 million and 640,000 years ago, tiny particles of volcanic debris (volcanic ash) covered much of the western half of North America, likely a third of a meter deep several hundred kilometers from Yellowstone and several centimeters thick farther away. Wind carried sulfur aerosol and the lightest ash particles around the planet and likely caused a notable decrease in temperatures around the globe.
How many caldera-forming eruptions have occurred from the long-lived hotspot that is currently beneath Yellowstone?
Graphic depicting the path left by the Yellowstone hotspot as the continental plate drifted above it.
(https://cod15.ru/wp-content/uploads/2017/11/8c7380f4a67db65c996a50f9a734e650.jpg)
Map showing the path of the Yellowstone hotspot.
Many eruptive units found along the path of the Yellowstone hotspot have been dated, but only a few of them represent large caldera-forming eruptions. At least five volcanic fields centered on large caldera complexes have been identified. Some of these caldera complexes erupted climatically more than once; probably 15 to 20 caldera-forming eruptions have occurred along the hotspot as it left a trail from western Idaho to Yellowstone within the past 16.5 million years.
How many giant eruptions have occurred in the Yellowstone National Park region and how large were they?
Volcanic activity began in the Yellowstone National Park region a little before about 2 million years ago. Molten rock ( magma) rising from deep within the Earth produced three cataclysmic eruptions more powerful than any in the world's recorded history. The first caldera-forming eruption occurred about 2.1 million years ago. The eruptive blast removed so much magma from its subsurface storage reservoir that the ground above it collapsed into the magma chamber and left a gigantic depression in the ground- a hole larger than the state of Rhode Island. The huge crater, known as a caldera, measured as much as 80 kilometers long, 65 kilometers wide, and hundreds of meters deep, extending from outside of Yellowstone National Park into the central area of the Park (see map in question above for location information).
Later, activity shifted to a smaller region within the Island Park area of eastern Idaho, just southwest of Yellowstone National Park, and produced another large caldera-forming eruption 1.3 million years ago. Subsequent activity has been focused within the area of the National Park, and another huge eruption 640,000 years ago formed the Yellowstone caldera as we now see it.
The three caldera-forming eruptions, respectively, were about 6,000, 700, and 2,500 times larger than the May 18, 1980 eruption of Mt. St. Helens in Washington State. Together, the three catastrophic eruptions expelled enough ash and lava to fill the Grand Canyon.
In addition to the three climactic eruptions, activity associated with each of the three caldera cycles produced dozens or even hundreds of smaller eruptions that produced both lava and pyroclastic materials.
(http://?)
Volumes of Yellowstone's giant volcanic eruptions compared with volumes of other major eruptions.
(https://i.pinimg.com/originals/28/34/26/283426c4035ce4dddd23676dc3602a05.jpg)
Yellowstone eruption volume comparison
Volumes of Yellowstone's giant volcanic eruptions compared with volumes of other major eruptions. Graphic used with permission from "Windows into the Earth, The Geologic Story of Yellowstone and Grand Teton National Park", Robert B. Smith and Lee J. Siegel, Oxford University Press, 2000.
This graphic shows that the three largest Yellowstone eruptions emitted much more material than the eruptions of Mount St. Helens (1980), Mount Pinatubo (1991), Krakatau (1883), Mount Mazama (7,600 years ago), and Tambora (1815).
https://volcanoes.usgs.gov/volcanoes/yellowstone/yellowstone_sub_page_54.html
Now then If you look at that last Map something interesting is revealed...
Since that "Hot Spot" seems to break through where the crust is thinner, that map bears out that theory...
On the one below you can see the first and second erupted when the Hot Spot was under a valley... separated by small mountain ranges.
The third one has a wider gap as well as a wider mountain range. and is just below that series of faults (black lines)
The 4th one has a wider gap and though its not a mountain range it is elevated and likely stronger rocks, then the eruption again
The next break is at the point of a mountain range that does appear to have a fault but the magma din't burst there then did again in the next valley a wider eruption. The next one is still in that valley
(https://scontent.flas1-1.fna.fbcdn.net/v/t1.0-9/32151654_1002521709924372_6530001477212045312_n.jpg?_nc_cat=0&_nc_eui2=v1%3AAeEwmP7QNjAopqDKKpcKOqwoyIOEuiHwbp99B5BeYC_p-yzaWugD4yaKayVXhRrn6elKBfpriMP8nNDGPkzA-OTKQhR3BymoRcgtitZysVPmqQ&oh=6ce3c5beb6c07cba5b038552cb043c27&oe=5B560285)
The next two.. (the mosy recent) are right beside each other, Though these are directly in a mountain range, you can see by the concentration of black and red dots these are earthquake rich zones so even though crust is thicker her, it is already fractured by EQs. The small cluster gave a smaller calders... the big cluster gave a bigger caldera.
Now right after that the mountains become thick and stable again... for a wide section... until the Hot Spot moves into Montana and that new plain.
Also notice that while under the mountains, despite the EQ fracture, the size of the caldera under the small cluster is a LOT smaller than the previous two in the open plain.... and the larger EQ zone's crater, while larger than the other, is still not as large as the two on the plain.
Also note that the other fault zones and even larger EQ fracture zones around the area do not trigger a volcanic event.., so it is only the moving magma hot spot that is of concern And looking at that map it seems that by now it is securely under the stable mountain range
I suppose one could mathematically figure out the relative speed of travel and thus predict WHEN it will reach that Montana plain... Anyone a math wiz? Might be famous for accurate prediction :P
So I predict, based on that geological evidence, that there will NOT be a major eruption until that magma bubble once again sits under thinner crust, that plain in Montana
Quote from: zorgon on May 10, 2018, 05:29:23 AM
So I predict, based on that geological evidence, that there will NOT be a major eruption until that magma bubble once again sits under thinner crust, that plain in Montana
Yes, and it doesn't look like that will happen in the next 1.5-2 million years.