Talk:Lake Toba

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Good article Lake Toba has been listed as one of the Geography and places good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it.
August 23, 2008 Good article nominee Listed
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Lake Toba Sustainability[edit]

Right now we formed a forum about Lake Toba Sustainability. Our institution concerned about destruction in lake Toba. Most of us came from Bataknese and people who take attention seriously to Lake Toba Ecosystem. Indonesian goverment, especially North SUmatera province in march invite more than a houndred govenoor from all of the world. They plan to establish ne concept about Lake Toba in the future. But at the other side, the concept they have planed does not invite people in the ecosystem. we predict that mot of the masterplan does not conduct local sociocultural aspects. They just make Lake Toba as they want without hear public interest. we plan to make the similiar summit as the goverment planed to, but in different way. we plan to invite all local traditional leader to join a summit paralel with the goverment.

everybody who want joining our program will be invited.

sicerelly

tua hasiholan hutabarat

Relevant?[edit]

I'm sorry but is this relevant to the page? It seems more like a propaganda of some sort [Unsigned]

If by "this" you mean the first topic on this talk page: You'll notice they didn't attempt to insert it into the article, did they? Seems to me mentioning it in Talk is entirely appropriate! GeorgeTSLC (talk) 18:53, 15 September 2012 (UTC)

Different, Lake Toba and Mount Toba[edit]

The past Mount Toba, with ancient history.

Present, Lake Toba with more other history, with Samosir Island on the center.

Isn't same article.

Toba catastrophe theory[edit]

The Toba catastrophe theory is linked to as the "main article" in the eruption section. The problem is that that article isn't really about the eruption but the theory of the eruption's impact on the development of man. As such, the article should be mentioned, but not as the main article with respect to that section. -Harmil 07:24, 6 October 2006 (UTC)

I went ahead and made the change.[1] -Harmil 07:36, 6 October 2006 (UTC)

Meaning[edit]

"toba" is Spanish for tuff. I suspect it is a coincidence, but what is the Indonesian meaning? --84.20.17.84 13:04, 23 January 2007 (UTC)

Biggest for how long[edit]

Somebody has stated that this (Young Toba eruption) is the biggest in the last in the last 2 million years. I have looked for bigger eruptions futher back and so far no eruption has surpassed it since around 27 million years ago so doesn't that make it the biggest volcanic eruption in the last 25 million years? Wiki235 16:49, 15 April 2007 (UTC)

The 2 mya statement may have come from the Volcano World page cited in the following paragraph (which incidentally has a horribly misleading size graphic). I'd agree with your statement if we restrict it to explosive eruptions; the Columbia River Basalt Group which erupted from 17 to 6 million years ago is much larger, and there could have been individual eruptions within it that were larger than Toba. Toba is the largest explosive eruption listed by Mason, Pyle and Oppenheimer (2004 - citation below) since 27-28 million years ago. If no one objects, I'll change our article accordingly. -- Avenue 02:32, 16 June 2007 (UTC)
Ben G. Mason; David M. Pyle, and Clive Oppenheimer (2004). "The size and frequency of the largest explosive eruptions on Earth". Bulletin of Volcanology 66 (8): 735–748. doi:10.1007/s00445-004-0355-9. 

Well seeing as no explosive eruption since La Garita has surpassed Toba I'll put that in. Wiki235 13:05, 8 July 2007 (UTC)

Somebody has put in that it was possibly the largest explosive vlcanic eruption withtin the history of the earth. This is incorrect. The eruption produced 2800 cubic km of material where as the La Garita eruption 27.5 million years ago produced 5000 cubic km which makes it larger. Please don't add claims that are not true.Wiki235 (talk) 20:54, 20 November 2007 (UTC)

Why is one of the photographs in the article captioned 'Lake Toba from the island of Prapat?' The maps I see show Prapat being on the periphery of the lake, not an island. Deedeebee (talk) 20:13, 1 February 2008 (UTC)

GA Review[edit]

This article is now out-of-date. Its references to having caused a global cool down an being responsible for killing much of humanity has been proven wrong. Please go to this link for the reprot: http://www.bbc.co.uk/news/science-environment-22355515 — Preceding unsigned comment added by 109.152.53.210 (talk) 16:13, 30 April 2013 (UTC)

This review is transcluded from Talk:Lake Toba/GA1. The edit link for this section can be used to add comments to the review.

GA review – see WP:WIAGA for criteria

{{subst:#if:This article is in decent shape, but it needs more work before it becomes a Good Article.|


This article is in decent shape, but it needs more work before it becomes a Good Article.|}}

  1. Is it reasonably well written?
    A. Prose is "clear and concise", without copyvios, or spelling and grammar errors:
    {{subst:#if:In the Geology section, "In 1949", it would be best if there was a comma placed after 1949.
    Done. --LordSunday 22:34, 20 August 2008 (UTC)|In the Geology section, "In 1949", it would be best if there was a comma placed after 1949.
    Done. --LordSunday 22:34, 20 August 2008 (UTC)|}}
    B. MoS compliance for lead, layout, words to watch, fiction, and lists:
    {{subst:#if:The lead seems a bit short, can more info. be added to summarize the entire article? The article tends to have "red links", if they don't have articles, it would be best to un-link them, per here. In The eruption section, it would be best if "caldera" is linked once, per here. In the More recent activity section, why is "1987" linked? Same section, "September 12th, 2007", "th" needs to be removed, per here.
    Done. --LordSunday 22:44, 20 August 2008 (UTC)|The lead seems a bit short, can more info. be added to summarize the entire article? The article tends to have "red links", if they don't have articles, it would be best to un-link them, per here. In The eruption section, it would be best if "caldera" is linked once, per here. In the More recent activity section, why is "1987" linked? Same section, "September 12th, 2007", "th" needs to be removed, per here.
    Done. --LordSunday 22:44, 20 August 2008 (UTC)|}}
  2. Is it factually accurate and verifiable?
    A. Has an appropriate reference section:
    {{subst:#if:It would be best if the references use the {{cite web}} format. Also, Reference 3 needs to be fixed. Reference 6, 12, 13, 14, 15, and 16 are missing Publisher info.
    Done, and ref 6 is empty for some reason. It appears the website has been renamed. --LordSunday 23:04, 20 August 2008 (UTC)|It would be best if the references use the {{cite web}} format. Also, Reference 3 needs to be fixed. Reference 6, 12, 13, 14, 15, and 16 are missing Publisher info.
    Done, and ref 6 is empty for some reason. It appears the website has been renamed. --LordSunday 23:04, 20 August 2008 (UTC)|}}
    B. Citation to reliable sources where necessary:
    {{subst:#if:Is there a source for this ---> "In 1949 the Dutch geologist Rein van Bemmelen reported that Lake Toba was surrounded by a layer of ignimbrite rocks, and that it was a large volcanic caldera. Later researchers found rhyolite ash similar to that in the ignimbrite around Toba (now called Young Toba Tuff to distinguish it from layers deposited in previous explosions) in Malaysia and India, 3,000 km away. Oceanographers discovered Toba ash, with its characteristic chemical "fingerprint", on the floor of the eastern Indian Ocean and the Bay of Bengal"? Does Reference 11 cover all this ---> "The eruption lasted perhaps two weeks, but the ensuing "volcanic winter" resulted in a decrease in average global temperatures by 3 to 3.5 degrees Celsius for several years. Greenland ice cores record a pulse of starkly reduced levels of organic carbon sequestration. Very few plants or animals in southeast Asia would have survived, and it is possible that the eruption caused a planet-wide die-off. There is some evidence, based on mitochondrial DNA, that the human race may have passed through a genetic bottleneck within this timeframe, reducing genetic diversity below what would be expected from the age of the species. According to the Toba catastrophe theory proposed by Stanley H. Ambrose of the University of Illinois at Urbana-Champaign in 1998, human populations may have been reduced to only a few tens of thousands of individuals by the Toba eruption"? Is there a source for this ---> "The volcanoes of Sumatra and Java are part of the Sunda Arc, a result of the northeasterly movement of the Indo-Australian Plate which is sliding under the eastward-moving Eurasian Plate. The subduction zone in this area is very active: the seabed near the west coast of Sumatra has had several major earthquakes since 1995, including the 9.3 2004 Indian Ocean Earthquake and the 8.7 2005 Sumatra earthquake, the epicenters of which were around 300 km from Toba"?
    Check. --  ThinkBlue  (Hit BLUE) 20:03, 23 August 2008 (UTC)|Is there a source for this ---> "In 1949 the Dutch geologist Rein van Bemmelen reported that Lake Toba was surrounded by a layer of ignimbrite rocks, and that it was a large volcanic caldera. Later researchers found rhyolite ash similar to that in the ignimbrite around Toba (now called Young Toba Tuff to distinguish it from layers deposited in previous explosions) in Malaysia and India, 3,000 km away. Oceanographers discovered Toba ash, with its characteristic chemical "fingerprint", on the floor of the eastern Indian Ocean and the Bay of Bengal"? Does Reference 11 cover all this ---> "The eruption lasted perhaps two weeks, but the ensuing "volcanic winter" resulted in a decrease in average global temperatures by 3 to 3.5 degrees Celsius for several years. Greenland ice cores record a pulse of starkly reduced levels of organic carbon sequestration. Very few plants or animals in southeast Asia would have survived, and it is possible that the eruption caused a planet-wide die-off. There is some evidence, based on mitochondrial DNA, that the human race may have passed through a genetic bottleneck within this timeframe, reducing genetic diversity below what would be expected from the age of the species. According to the Toba catastrophe theory proposed by Stanley H. Ambrose of the University of Illinois at Urbana-Champaign in 1998, human populations may have been reduced to only a few tens of thousands of individuals by the Toba eruption"? Is there a source for this ---> "The volcanoes of Sumatra and Java are part of the Sunda Arc, a result of the northeasterly movement of the Indo-Australian Plate which is sliding under the eastward-moving Eurasian Plate. The subduction zone in this area is very active: the seabed near the west coast of Sumatra has had several major earthquakes since 1995, including the 9.3 2004 Indian Ocean Earthquake and the 8.7 2005 Sumatra earthquake, the epicenters of which were around 300 km from Toba"?
    Check. --  ThinkBlue  (Hit BLUE) 20:03, 23 August 2008 (UTC)|}}
    C. No original research:
    {{subst:#if:|{{{2ccom}}}|}}
  3. Is it broad in its coverage?
    A. Major aspects:
    {{subst:#if:|{{{3acom}}}|}}
    B. Focused:
    {{subst:#if:|{{{3bcom}}}|}}
  4. Is it neutral?
    Fair representation without bias:
    {{subst:#if:|{{{4com}}}|}}
  5. Is it stable?
    No edit wars, etc:
    {{subst:#if:|{{{5com}}}|}}
  6. Does it contain images to illustrate the topic?
    A. Images are tagged with their copyright status, and valid fair use rationales are provided for non-free content:
    {{subst:#if:|{{{6acom}}}|}}
    B. Images are provided if possible and are relevant to the topic, and have suitable captions:
    {{subst:#if:|{{{6bcom}}}|}}
  7. Overall:
    Pass or Fail:
    {{subst:#if:If the following statements can be answered, I will pass the article. Good luck with improving this article!|If the following statements can be answered, I will pass the article. Good luck with improving this article!|}}

--  ThinkBlue  (Hit BLUE) 22:01, 20 August 2008 (UTC)

After reading the article, I have gone off and passed the article. Congratulations. If you feel that this review is in error, feel free to take it to a GA review. Thank you to LordSunday who worked hard to bring it to this status, and congratulations. ;) --  ThinkBlue  (Hit BLUE) 20:03, 23 August 2008 (UTC)

surface area[edit]

It would be good to make it clear, in the infobox, whether the surface area includes or excludes Samosir, e.g. "area = 1,130 km² (excluding Pulau Samosir)". --Chriswaterguy talk 20:00, 24 August 2008 (UTC)


civilization?[edit]

"scientists believe might have wiped out much of civilization." As far as we know, there were no civilizations 75,000 years ago. I'm being WP:BOLD and changing it to "much of humanity"; if this is wrong for some reason or you have a better wording, please change it. Vultur (talk) 00:09, 29 August 2008 (UTC)

Island of Prapat[edit]

I asked this a year ago but there's been no explanation or correction, so I will ask it again-Why is one of the photographs in the article captioned 'Lake Toba from the island of Prapat?' The maps I see show Prapat being on the periphery of the lake, not an island? Deedeebee (talk) —Preceding undated comment was added at 22:41, 31 January 2009 (UTC).

Date of eruption[edit]

I've changed the line in the lead paragraph from "it is the site of a supervolcanic eruption that occurred 75,000 years before the present" to "...that occurred 74,000 years before the present", as this is what the sources used in the article agree on Dom Kaos (talk) 22:46, 15 June 2009 (UTC)

Coordinate error[edit]

{{geodata-check}} The coordinates need the following fixes:

  • Write here

kanker 92.70.169.90 (talk) 12:28, 11 September 2009 (UTC)

Done. BrainMarble (talk) 02:16, 10 December 2009 (UTC)

The size of the eruption in comparison to others[edit]

Look I'm sick of people changing this page, stating that this eruption was the largest of any kind anywhere in the last 25 million years. It wasn't. The Columbia River Basalt Group which began around 14 MYA and lasted up until 6 MYA were far, far larger than Lake Toba. If we restrict the statement to explosive eruptions then it's fine, but in it's present state it's not. I'll change it to explosive eruptions, if you want to change it back and have proof that this eruption exceeded the 174,300 km³ erupted by the Columbia River Basalt Group i.e. an article by a geologist which states this eruption exceeds VEI 8 and is infact the VEI 10 it would need to be to support the statement, then please provide the evidence. If you don't understand, either leave me a message or talk to one of the senior members of WikiProject Volcanoes. Thank you. Wiki235 (talk) 22:12, 14 July 2010 (UTC)

"Largely debated"[edit]

The two words in the lead, "largely debated", caught my eye. The article reads, "According to the Toba catastrophe theory to which some anthropologists and archeologists subscribe, it had global consequences, killing most humans then alive and creating a population bottleneck in Central Eastern Africa and India that affected the genetic inheritance of all humans today.[5] This theory however, has been largely debated as there is no evidence for any other animal decline or extinction, even in environmentally sensitive species.[6]" But what % of anthropologists and archeologists subscribe to this theory? It sounds like it could be a minority view. The source[2] for the last sentence concludes "We conclude that it is unlikely that the Toba super-eruption caused a human, animal or plant population bottleneck." I don't think "largely debated" tells us much about what mainstream scholars think. Jesanj (talk) 00:51, 24 June 2011 (UTC)

Perhaps "largely contested" is an accurate description? Anyone know? Jesanj (talk) 00:55, 24 June 2011 (UTC)

Error in photo editing[edit]

The photo named Ambarita2.jpg has an error in editing. This image was created from a set of overlapping images and there is an error in the middle of the photo. There's a large section that is duplicated, as if the two images were pasted together in the wrong place. I did a tentative correction eliminating the redundant pixels that resulted in an image 4254 pixels wide vs. the 5208 pixels of the image as posted here. Vhilden (talk) 11:15, 22 January 2012 (UTC)