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Notice the part where it says "none of these things are likely to have any effect and would likely cause an eruption." Well which one is it!?
The current article claims "Smaller explosive eruptions, similar to the 1980 Mount St. Helens eruption, occur every 20,000 years or so; an explosion 13,000 years ago left a 5 kilometer diameter crater at Mary Bay, on the edge of Yellowstone Lake (located in the center of the caldera)." This contradicts with the statement "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." from the Yellowstone Volcano Observatory FAQ. Does anybody know which version is correct? -- Jochen 16:39, 27 Feb 2005 (UTC)
I noticed the article now states that the caldera was discovered using satellite imagery. I haven't heard that before; any references from anyone? Gwimpey 03:51, 1 October 2005 (UTC)
On 29 Jan 06 the user 68.49.15.215 added the text "The oldest identified caldera remnant is straddling the border near McDermitt, Nevada-Oregon" Does anyone know the source for this? I admit I am not current, but the last I read the chain stopped in the Blue Mountains area of eastern Oregon/Idaho. In fact, summer 05 the geologist at Craters of the Moon said the same thing. But then both of us could have been wrong. Ralph 16March06
We all are going to die...
Why cannot this bubble of magma be lanced like a boil to let it all out slowly?-- Light current 02:55, 24 January 2007 (UTC)
But if you drilled into the magma while pumping drilling mud down the hole, the magma around the hole would solidify as the hole is drilled. Keep pumping water down the hole and the wall of the hole could be kept solid indefinitely. Hopefully the wall of the hole would be porous enough to allow the gasses trapped in the magma to pass through the wall and then exit up the hole. As I understand it, it's the trapped gasses in the magma that are the biggest problem. If dozens of drill holes won't relieve enough pressure, then drill thousands of holes. —Preceding unsigned comment added by 98.151.193.249 ( talk) 01:37, 29 March 2009 (UTC)
Dunno if I should have created a whole new topic of this, but I was thinking that should there be placed some reassurance on the article that, on the span of it's activity humanity has observed it very little and we don't exactly know if the sudden elevation changes mean much anything or are indicative of anything else than normal activity. I'm not that easily mentally stressed, but I'd be lying if the report of "never before seen rise of upwards of 7 centimetres" didn't cause me some anxiety. -- Petrim ( talk) 14:03, 22 October 2008 (UTC)
If you draw points on a map for the 3 supervolcanoes in the US, and make a triangle, in the middle of the triangle seems to be a basin located in Utah. Also, around the triangle seems to be a rim of mountains, some over 3 km high, and in the middle and around it is mostly lower land. This sounds like the shape of a volcano, so is it possible that this whole area is a massive supervolcano? Should it be kept away from the article? How big is the largest supervolcano except for this hypopethical one? Thanks. A stroHur ricane 00 1( Talk+ Contribs+ Ubx) 21:54, 5 February 2007 (UTC)
Smaller steam explosions occur every 20,000 years or so; an explosion 13,000 years ago left a 5 kilometer diameter crater at Mary Bay on the edge of Yellowstone Lake (located in the center of the caldera).
No. Volcanic eruptions occurred every 20,000 years from 640,000 years ago until 70,000 years ago. During the last 15,000 years, there have been no volcanic eruptions but lots of steam (hydrothermal) explosions, including the one at Mary Bay. Some may have occurred earlier, but evidence was largely wiped out by the glaciers.
A full-scale eruption of the Yellowstone caldera could result in millions of deaths locally and catastrophic climatic effects globally, but there is little indication that such an eruption is imminent.[citation needed] Best citation is probably that by two of the coordinating scientists of YVO. Lowenstern, J.B., Smith, R.B., and Hill, D.P., 2006, Monitoring Super-Volcanoes: Geophysical and Geochemical signals at Yellowstone and other caldera systems. Philosophical Transactions of the Royal Society A, v.264,no. 1845, p. 2055-2072.
It is available in pdf on the home page of the YVO website (link is there). Article is written for a general scientific to lay audience.
>Geologists are closely monitoring the rise and fall of the Yellowstone Plateau, which averages +/- 1.5 cm yearly, as an indication of changes in magma chamber pressure.[citation needed]
The up and down movement is highly variable. An average is not very meaningful. The caldera has moved up about 7 cm each of the past two years. A good description is in the article above, or you can simply link to the GPS data on the website. There is also another USGS Fact Sheet (Brantley et al., 2004) on the YVO website that discusses uplift in some detail.
>Occasionally proposals are suggested for ways to safely relieve the buildup of dissolved gas in the Yellowstone magma chamber, usually involving drilling holes or using explosives to release small amounts of pressure in a controlled manner.[citation needed]
You won't find any citations because there aren't any credible plans. This is not technically feasible, as is pointed out here on the comment page.
69.144.201.130 14:13, 19 March 2007 (UTC)
This report was released on March, but it doesn't appear to have made it here yet...
http://www.msnbc.msn.com/id/17629668
"Data shows that the caldera floor sank 4.4 inches from 1987 until 1995. From 1995 until 2000, the northwest rim of the caldera rose about 3 inches, followed by another 1.4-inch rise until 2003. Then between 2000 and 2003, the caldera floor sank a little more than an inch.
And then from 2004 to 2006 the central caldera floor rose faster than ever, springing up nearly 7 inches during the three-year span."
- Electrostatic1 10:05, 19 May 2007 (UTC)
The banner at the top of this article and the Yellowstone Plateau one say to come here to find the discussion of a merge. I don't see any. Is something out of sync or is there just no discussion?
This article appears to have been lifted word for word from wordpress.com (or vice versa).
I'd like to comment that the Plateau article talks a lot more about a caldera than a plateau. IMHO, as it stands, merging it makes sense. But speaking as a casual passer-by, it would be nice to see it stand on its own by showing and telling the how, what, and where of the plateau. I don't usually think of plateaus and caldera as coexisting. Kkken 08:23, 12 August 2007 (UTC)
From the article: "The caldera's apparent motion to the east-northeast forms the Snake River Plain." No, that is wrong: The caldera is a geographic feature that doesn't move any more than a mountain or a lake moves. The hotspot stays more or less in place while the continent moves above it; separate calderas are formed above the hotspot. Yellowstone caldera is merely the last caldera formed via this process from a supereruption. Younger calderas exist, but they weren't from a supereruption. Older calderas exist, but they are not older expressions of this caldera. The article also gives the impression that the Huckleberry Ridge and Island Park supereruptions and calderas were from a feature called the "Yellowstone Caldera". I'll fix the glaring errors but this article needs to be moved to a more appropriate place. -- mav ( talk) 22:01, 27 September 2008 (UTC)
I had seen a show on TV about the Yellowstone supervolcano. In the show, they said it was likely to have caused the near-extinction of humans. I wondered if this kind of thing could be integrated into the article. Brian Pearson ( talk) 02:54, 1 October 2008 (UTC)
The near extinction of humans has been speculated by various scientists looking at a variety of other factors (a larger set of factors than just the eruption and it's environmental and geological aftermaths). For instance, the destruction of the "Bread Basket" of the US will lead to a drop in available food in the US to levels that cannot sustain our population at even a tenth of it's current level. Similar things were taken into account worldwide.
Basically, these claims are based on the differences of such an explosion a few thousand years ago where our population's survival needs (food, water, shelter) were quite minimal compared to now when we are already having problems with resources. They also include other societal impacts such as war if memory serves. Inotherwords, if there were only a few million people on the Earth and we were still hunter/gatherers, the death rate (as a percentage) would be small. But with the billions currently alive, and with most not knowing how to fend for themselves (much less "simple" things like how long food lasts without refridgeration, how to make clothing or find/build shelter) the expected extinction level is supposedly going to be much higher in the case of a VEI8 eruption.
RobertMfromLI | RobertMfromLI 20:09, 22 December 2009 (UTC)
There have been three additional quakes on 31 December 2008, with the most recent one occurring at 0842 MST. I have edited that section to reflect this. I am watching activity here. University of Utah Seismograph Stations: Recent Earthquakes for Yellowstone Tr1290 ( talk) 15:52, 31 December 2008 (UTC)
Observe
Due to the volcanic and tectonic nature of the region, the Yellowstone Caldera experiences between 1000 and 2000 measurable earthquakes a year, though most are relatively minor, measuring a magnitude of 3 or less. Occasionally, numerous earthquakes are detected over a short period of time, an event known as an earthquake swarm. In 1985, more than 3000 earthquakes were measured over several months. More than 70 smaller swarms have been detected between 1983 and 2008. It is believed that these swarms are not caused by movements of magma but of hot water and gas.[9] The most recent swarm occurred in December 2008 and continued into January 2009, with more than 500 quakes detected under the northwest end of Yellowstone Lake over a seven day span, with the largest registering a magnitude of 3.9
more than 3000 over 'several months' 'it is believed that' perhaps re-word this article to be more informative then questioning —Preceding unsigned comment added by GamesMaxter ( talk • contribs) 12:57, 4 January 2009 (UTC)
Second paragraph under "Volcanism" states: "At least a dozen or so of these eruptions were so massive that they are classified as supereruptions." In the next paragraph, "within the past 17 million years, 142 or more caldera-forming eruptions have occurred from the Yellowstone hotspot." Is this a difference in opinion (I know the 142 number just came out recently), or is there a distinction here between caldera-forming eruptions and supereruptions? Do the last three eruptions over the last 2.1 million years qualify as either? SkoreKeep ( talk) 09:18, 29 April 2009 (UTC)
Caldera-forming eruptions are just any eruption where enough magma is expelled to reduce the pressure to below that needed to support the overlying crust, resulting in a large area of crust collapsing over the depressurized area. Eruptions of magnitude 5 and higher have been known to produce calderas. Supereruptions are magnitude 8, 1000 times the size of a 5. Only a very small fraction of the world's calderas were created by eruptions of this scale. — Preceding unsigned comment added by 12.45.169.2 ( talk) 13:36, 15 December 2011 (UTC)
Perhaps a mention of the Bruneau-Jarbridge eruption, which caused the ashfall that killed all the fauna at Ashfall State Park in northeastern Nebraska, 1000 miles away? I essayed a mention. 71.229.179.61 ( talk) 10:03, 29 April 2009 (UTC)
In the "Infobox Mountain", it says,
Last eruption= 70,000 years ago ( magmatic) / 1350 BC ± 200 years ago ( hydrothermal) [1]
and I have no problem with the figure for "( magmatic)". (This comment is mostly about ambiguity, anyway, -- not [mainly] about whether the numbers are correct.)
However, the figure given for "( hydrothermal)" is ambiguous. It does not make sense, with the ridiculously repetitively ambiguity-prone words, "BC" and "years ago".
If it just said "1350 BC ± 200 years", (without the word "ago"), then that would make sense -- it would mean "somewhere in the range 1550 BC to 1150 BC". I don't know whether that is what was intended, but at least it would not be ambiguous. (It also would not have to be updated, from one year's "edition" of Wikipedia to the next.)
[...snip... (long comments not needed any more!) ]
I looked again at the "source" web page,
http://www.volcano.si.edu/world/volcano.cfm?vnum=1205-01- , -- that is, the web page that reference "[2]" (the one that says <ref name="GVP"/>
) has a
hyper-link to -- and NOW I see, where those numbers (the numbers "1350" and "200") came from! They are in the "Last Known Eruption:" field at the top of that web page.
SO... the answer is, that the word "ago" just needs to be removed. I plan to make that change.
Thanks, -- Mike Schwartz ( talk) 15:33, 22 December 2009 (UTC)
Update on last eruption: A figure stating the last eruption as 1350 BC is not correct. This implies an actual volcanic eruption involving stuff like magma and ash being released. The activity in the 1350 BC timeframe was nothing more than a particularly nasty steam explosion. We don't update our 'Days Since Last Eruption' signs every time a geyser blows its top. Even steam explosions that leave mile wide craters (which have occured in Yellowstone's past) do not count as eruptions. '70,000 years ago' is the most scientifically correct, unambiguous statement you can make regarding the last true eruption. — Preceding unsigned comment added by 2601:7:6002:418B:941D:6754:C42F:5A1B ( talk) 05:45, 24 April 2015 (UTC)
Regarding the edit warring, ambiguity and misinformation:
Here's what I would like to say. Those updating this article may wish to solely base their edits and conclusions on the scientific data and actual reports released than on the various other speculative, misinformative and/or downright incorrect sources - including the USGS's very own little video segments on this issue (look at their reports - not their "for public consumption" material).
As a for instance, the US government, on the NON USGS site, has a page about Yellowstone that downplays the possibility of an eruption as nigh impossible due to the "mountain" it sits under (I'll provide the link if I can dig it out of my bookmarks). This is totally erroneous and based on absolutely no scientific data whatsoever - moreso, the scientific data and history prove otherwise.
For instance, we already know that the Snake River Plain was created by the vulcanism of this hotspot... this hotspot has already ripped a chunk out of the Rocky Mountains big enough to fit the majority of the Appalachian Mountain Range in. (See: http://www.robertmauro.com/Images/Yellowstone/Yellowstone_and_Elevations.jpg) - this has already been outlined in various USGS reports, yet a non USGS government site contains such a nonsense claim.
The above map is the LongValley Caldera Digital Elevation Data (DEM) by the USGS with a box overlaid showing the hotspot's "travel"/eruption path (Yellowstone-Newberry hotspot map) - and yes, I know it's not the hotspot that's travelling - it's the tectonic plate. So, we know this hotspot has already levelled a lot of mountain, and we also know it really isn't sitting under one right now - it's sitting under a valley and plateau it created.
That is just one example. Another interesting thing I found was this... if one reads Bob Christiansen's report (the 90+ page 2005 one I believe), he notes on the first page that a large super-eruption is unlikely because certain other criteria need to be met. Yet, about 2/3rd of the way through the report, he notes that most of the precursors are already occurring. The rest (larger hotspot than we previously believed containing molten rock, increased ground swelling, etc) we have come to understand (since the report) are also occurring.
So, my point is this... I suspect all this edit warring and misinformation is being caused because a lot of people are simply reading the misinformation out there on this topic.
I'm not sure why various other sites (especially other governmental sites) are spreading such misinformation - nor why the USGS themselves (in possibly their attempt to "dumb down" the content to understandable levels for the general public) are stating things that are either somewhat or entirely different than their own scientific conclusions... but fact of the matter, that seems to be the case. Maybe it's to prevent mass hysteria or a public scare?
Regardless, it will be the cause of a lot of conflicting information on this topic (and thus probably more edit warring). Perhaps properly and/or thoroughly citing each conflicting claim or piece of information will retain the article's accuracy and minimize edit warring. I haven't added anything to the Yellowstone page simply because I've got over 100 links, articles and reports I'd have to wade through to properly cite any claim I post (and dont have the time to do that) - and thus wish to avoid becoming embroiled in an edit war or create additions to the article that are not properly cited.
Related (or unrelated?) note: I've been studying this issue (as in researching the existing reports, claims and data - not as in going to Yellowstone as part of the survey team) for one of the jobs I am working on. So, it's more than just a passing interest to me.
RobertMfromLI | RobertMfromLI 20:09, 22 December 2009 (UTC)
In my opinion the supervolcano term is not supposed to be use, instead only super eruptions (VEI 8) are produced by a extreme tapping of the system of magma chambers. In caldera setting the majority of the eruptions are relatively small, usually less than 1-2 km3. The 95> % of the eruptions are VEI 0-4. Caldera volcanoes naming as a supervolcano might distract the people mind from the more relaistic and frequent event and the resulting hazards, such as hydrotermal explosions and lower VEI eruptions. Cheers, Szabolcs Kosik — Preceding unsigned comment added by 130.123.103.11 ( talk) 03:50, 10 June 2016 (UTC)
The article currently states that the oldest identified caldera remnant of the Yellowstone hotspot straddles the border near McDermitt, Nevada-Oregon. However there may be a dispute with this claim. Volcanics of the Carmacks Group in southwest-central Yukon were previously thought to be products of volcanic arc of back-arc basin volcanism due to the potassic character of them, but more recent studies have shown that the Carmacks Group was erupted during a magmatic lull and they lack coeval calc-alkalic batholiths such as are commonly associated with continental volcanic arcs. Volcanics of the Carmacks Group are petrologically similar to plume-related Eocene to Pliocene age potassic lavas of western United States and hotspots with lifespans of around or greater than 100 million years are common. The Yukon-Tanana Terrane and Intermontane Belt appear to have experienced less than 1,000 km (620 mi) northward translation with respect to North America since 70 million years ago, consistent with geological estimates of motion along plausible accommodiating faults. In addition, past mobility of the Hawaii hotspot implies that hotspots in the Pacific Ocean may have experienced 1,200 km (750 mi) of southward motion from 81 to 47 million years ago. If this analysis is correct, the Late Cretaceous location of the Yellowstone hotspot if it existed 70 million years ago would likely have created the Carmacks Group, which currently lies more than 1,000 km (620 mi) north of the plume. Volcaniclastic piles and arcuate faults in the group are understood to define caldera complexes with diameters of more than 60 km (37 mi). So the claim The oldest identified caldera remnant straddles the border near McDermitt, Nevada-Oregon is likely to be doubtful. BT ( talk) 13:41, 9 June 2010 (UTC)
Could we not leave the sentences so, and add a note about the Carmacks Group? 17 Ma is "quite recent", the Hawaii-Emperor Bend, 81 to 47 Ma, and the Pacific Plate rotation at 110 to 100 Ma, are "quite far away", another "epoch/ cycle". -- Chris.urs-o ( talk) 05:11, 10 June 2010 (UTC)
This article states that " Although the hotspot's apparent motion is to the east-northeast, the North American Plate is really moving west-southwest ". The last time I checked, Wyoming was to the west of Nebraska, not east. North and south are correct, though. I just changed it, so it should be right, but I make mistakes too. Just thought it should be known. —Preceding unsigned comment added by Thetrellan ( talk • contribs) 21:09, 28 July 2010 (UTC)
This article may need to be updated to include the lastest info on frequency of eruption. I am not qualified to do so. However, here is where I saw the new info: Closer Than You Think — Preceding unsigned comment added by 64.19.148.242 ( talk) 21:06, 1 May 2012 (UTC)
There's no reason we should include running tables with every earthquake since 2000 down to magnitude 1, is there? Geogene ( talk) 18:48, 17 December 2013 (UTC)
I'd like to call attention to reference #37, "Yellowstone is being monitored!". This is someone's private blog, not an authoritative source. Belnova ( talk) 08:12, 22 December 2013 (UTC)
I'm so sorry, I was reading this article, and saw some weirdness at the end of the "Earthquakes" paragraph. It reads as follows: "This swarm reached the background levels by 21 February. i was pua stoned and it went fucking kaboom martin shit himsel" I seriously don't think this belongs. Just figured I would bring it to y'alls attention, so you could get it fixed. Thank you! :) 24.249.236.5 ( talk) 21:00, 9 January 2014 (UTC) Phoenix L.
I was tempted to add to that:
Not that I do totally agree with the real quote, but unfortunately the ground has already been plowed with salt and the well truly poisoned. One has to fight the good fight, nonetheless. SkoreKeep ( talk) 17:26, 14 February 2014 (UTC)
A the segment that is both italicized and bolded was recently added to the article: This is about 2.5 times bigger than scientists had previously imagined it to be, approximately the same size that Yellowstone's magma chamber was during its last major eruption. However, some scientists believe that the proportion of melt is much too low to allow another supereruption.[15][16] I can't find the bolded text explicitly in the sources given, but I do have something similar in one [2]: The larger imaged size of the magma reservoir better matches the geologic record of Late Quaternary volcanic eruptions and lava flows but, importantly, does not increase the volcanic hazard in the Yellowstone region. I find these two statements are not equivalent in meaning and am inclined to strike the bolded part from the article as well as the qualifier "some" which implies this is a minority view among scientists. A lot of readers are probably interested in the possibility of a "supereruption" at Yellowstone, I think it's a good idea not to put things in that article that are likely to be taken out of context or reinforce fears. The most important thing in the source is the explicit statement that the risk is not increased by the findings. Geogene ( talk) 19:55, 10 October 2014 (UTC)
Could this be an interesting picture to add? http://www.smu.edu/~/media/Site/Dedman/Academics/Programs/Geothermal%20Lab/Graphics/TemperatureMaps/SMU_2011_35kmTemperature.ashx?la=en (yeah, the red dot is Yellowstone) — Preceding unsigned comment added by 188.113.87.62 ( talk) 07:55, 7 April 2015 (UTC)
Firstly, no need to create public panic about a volcano that isn't likely to erupt soon. Showing the last eruption as 1350 B.C. gives the impression it erupts more commonly than it does.
Secondly, a volcanic eruption, by common definition, requires the release of lava or volcanic ash. Neither of these has happened in at least 70,000 years.
The 1350 B.C. time frame refers to a single, or possibly a series of steam explosions. Steam explosions are a by-product of volcanic activity in the same way that earthquakes are. Even if the steam explosions produce mile-wide craters (which Yellowstone has produced in the past), these are not volcanic eruptions.
If steam explosions were classified as eruptions, you'd have to pick a line where a steam explosion is big enough to be an eruption, or just a geyser exploding. We can't reset our 'Days since last eruption' signs every time a geyser blows its top off.
The most scientifically correct statement to make regarding the last eruption of the Yellowstone Caldera is that the last eruption was a lava flow at least 70,000 years ago. This is the correct figure for anyone searching for this information to find. If they want to look deeper into it, then they can find information regarding massive steam explosions in the Yellowstone Caldera in the references and know that these are not technically eruptions. — Preceding unsigned comment added by 2601:7:6002:418B:941D:6754:C42F:5A1B ( talk) 07:10, 24 April 2015 (UTC)
I removed a block of text that had been recently added on the University of Utah study. Firstly, it's not exactly correct that the size of the reservoir is larger than was thought. Rather, it's that a connection between the shallow chamber and the plume that had been predicted by theory was located. As the source says, the actual volcanic hazard is concerned with the shallow chamber. The quote was also unnecessary (don't quote in an article unless the person quoted is saying something potentially ambiguous) and there was a copyright issue with the text, which was much too close to that of the source. And finally, I'm not sure this was weighted appropriately. It's a recent finding, by one research team, that seems to fit with the existing theory. It could be left out completely, or better yet, worked into the text in a less conspicuous place. Geogene ( talk) 18:14, 5 May 2015 (UTC)
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The current earthquake swarm is missing from this article. 108.171.131.168 ( talk) 19:49, 19 September 2017 (UTC)
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The section "Yellowstone hotspot origin" relies in its vocabulary on a term defined elsewhere in the article. I therefore thought it advisable to make "Volcanism" the first section, clarifying its title in the process, and to relegate the "origin" section to appearing second. Harfarhs ( talk) 18:17, 17 February 2018 (UTC)
At Talk:Main Page, User:Jesseleeo has pointed out that two different names and dates are given for the eruption that created Big Thumb Bay/Lake:
And presumably the correct name is "West Thumb Bay' not "West Thumb Lake".
Is that correct? And if so, can someone correct it in the article, please? 213.205.251.81 ( talk) 07:53, 28 July 2018 (UTC)
Lackey, Katharine (August 21, 2018).
"Why you can stop worrying Yellowstone's supervolcano is about to end the world".
USA Today. This showed up in print today.
Mapsax (
talk) 15:23, 7 September 2018 (UTC)
Malachite Man paleo.cc/paluxy/moab-man.htm ...was discovered in the 1970s, and has been revisited yearly by professionals from all over the U.S. It would seem quite possible, that the layers under which the skeletons were recovered, were deposited by eruptions of Yellowstone. The age of the layer under which the skeletons were recovered should reflect the eruption on a timeline that will coincide. This will offer some kind of relative dating for the nativity theorys present at #42LE561 The Lacamas Morass in SW Washington State. — Preceding unsigned comment added by Muleywagon ( talk • contribs) 22:49, 12 March 2019 (UTC)
I think we should change the name of the article to 'Yellowstone Supervolcano' or 'Yellowstone Plateau Volcanic Field' and remove the other page called that. USGS refers to the volcano as the Yellowstone Plateau Volcanic Field on their website and the Yellowstone Caldera only refers to the caldera formed by the latest eruption. Faren29 ( talk) 18:14, 22 April 2021 (UTC)