Talk:Timeline of volcanism on Earth

More useful

It might be more useful to present this information in a chart so that users can sort by date, name (alphabetic), Volcanic Explosivity Index, volume of tephra.

Might be, but I do not know how to do that, and Volcanic Explosivity Index is only completely available on the Holocene. --Chris.urs-o (talk) 06:53, 11 February 2010 (UTC)

Global Volcanism Program, Smithsonian Institution [1] is complete over the Holocene epoch, it has all large eruptions VEI 4 listed. --Chris.urs-o (talk) 04:48, 12 February 2010 (UTC)

Maybe you could copy the format from another article. OR look here. --Guanlong wucaii 12:55, 21 February 2010 (UTC)

Thx. Didn't know you can do this on the client side too. I want to try to built a summary, in a Client-based self-sorting table. --Chris.urs-o (talk) 10:21, 22 February 2010 (UTC)

Scope

The lead sentence says that only VEI-6 eruptions are included, but several LIPs and hotspots have been added, with no evidence that these have produced large explosive eruptions. Should we include them? (If so, the lead sentence should reflect this.) -- Avenue (talk) 09:52, 23 February 2010 (UTC)

I know. In the Holocene, all VEI-6 are included, and the Eldgjá eruption, because the sulfur dioxide emission resulted in a Volcanic winter. Before Holocene, all Wiki VEI-6, VEI-7, VEI-8 are included. Yellowstone and Laacher See too, research never ends... work in progress... In the end, there are some LIPs because of their sulfur dioxide emission, and some important Hotspots, to give an idea of the time scales. I'm thinking how to formulate a wise lead sentence. Before the Holocene, it is difficult to find facts. I think Yellowstone hotspot, Eifel hotspot, Santorini and Taupo Volcanic Zone are very regular, and endanger heavy populated areas, so their large eruptions should be included too. It is assumed that an eruption before the Holocene must be very large to be still noticed by us. The Holocene is a very short period of time to get an overview of the colossal eruptions. The large igneous provinces are important too, the main point is a timetable of potential climate cooling through sulfur dioxide emission resulted by volcanic activity. The idea behind is Yellowstone, and its alarming earthquake swarms. --Chris.urs-o (talk) 15:14, 23 February 2010 (UTC)

Maybe, someday, somebody can link the North and South Poles ice core sulfuric acid spikes with each volcanic Sulfur Dioxide emission. --Chris.urs-o (talk) 13:37, 27 February 2010 (UTC)

Topic paragraph

I've enjoyed watching this article emerge, but I think a topic paragraph is needed. The current leading paragraph explains the data limits, exclusions, etc., but does not summarize or focus the information for the reader. Obviously, major volcanic eruptions significantly impacts the earth's geology, climate and biosphere. But what else should the article say? Chris.urs-o, did you have a specific goal for this article/list? What were your objectives here? Best wishes. WBardwin (talk) 08:39, 1 March 2010 (UTC)

Well this is a list, I'm still fighting to get data, and references before Holocene. As every list, it needs to be kept "manageable". The GVP list of large eruptions (greater than VEI 3) is only over the Holocene, and the time frame must be much longer for an overview of eruptions greater than VEI 5. I wanted an overview, as the Yellowstone shows earthquake swarms and San Francisco waits for the "big one" (1906 + 101 years). The specific goal is VEI and sulfur dioxide emissions and volcanic winter relationship, I assume. --Chris.urs-o (talk) 08:58, 1 March 2010 (UTC)

Maybe you are right, I have a topic problem. Maybe, I tried to make two lists in one. This list focus on VEI 6 eruptions or larger or equivalent sulfur dioxide emission, the background is to list eruptions relevant for global cooling. Another list would be the eruptive history of VEI 5 eruptions or larger that endanger many people, so Decade Volcanoes (Avachinsky-Koryaksky, Kamchatka; Colima, Jalisco and Colima; Mount Etna, Sicily; Galeras, Nariño; Mauna Loa, Hawaii; Mount Merapi, Central Java; Mount Nyiragongo, Great Rift Valley; Mount Rainier, Washington; Sakurajima, Kagoshima Prefecture; Santamaria/Santiaguito, Central America Arc; Santorini, Cyclades; Taal Volcano, Luzon Arc; Teide, Canary Islands; Ulawun, New Britain; Mount Unzen, Nagasaki Prefecture; Vesuvius, Naples), Pinatubo, Toba, Mount Meager, Yellowstone hotspot, and Taupo Volcanic Zone. --Chris.urs-o (talk) 11:06, 4 March 2010 (UTC)

A list of earthquakes and eruptions of the last hundred years is another possibility. As strong earthquakes break open a leak on magma chambers under pressure limits and strong earthquakes are linked to relative movements between two tectonic plates. A big movement on one side of the Pacific Ring of Fire creates a strong strain on the other side of the Pacific Ring of Fire, a Lever law. I hope I'm right, though. --Chris.urs-o (talk) 10:52, 1 March 2010 (UTC)

9.2, Alaska (1964): Good Friday Earthquake; 9.5, Chile (1960): Great Chilean Earthquake; 7.9, San Francisco (1906): 1906 San Francisco earthquake; 9.3, Sumatra (2004): 2004 Indian Ocean earthquake; 8.8, Chile (2010): 2010 Chile earthquake; Image:Graph of largest earthquakes 1906-2005.png

List seems to never end

"Supplementary Table to P.L. Ward, Thin Solid Films (2009) Major volcanic eruptions and provinces" (PDF). Teton Tectonics. Retrieved 2010-03-16. got 128 eruptions with erupted volume between Miocene and before Holocene, and 99 events in the Holocene. I just have 140 eruptions and 5 VEI eruptions. :( --Chris.urs-o (talk) 19:46, 17 March 2010 (UTC) This page might get 80 kbytes long and 100 references, is it ok? --Chris.urs-o (talk) 08:29, 22 March 2010 (UTC)

I just checked one entry that seemed dubious to me, that for the Uzon-Geizernaya twinned caldera. According to Ward, this 9 km x 18 km caldera resulted from an eruption about 40,000 years ago that produced 1,700 km³ of ejecta. That didn't seem right to me: the caldera seems much too small for that tephra volume. Looking around, I see that people seem to roughly agree on the caldera size (e.g. 16 x 10km here), so the problem could be the volume. The "WEB1" reference in Ward could be the problem's source: it talks of the associated ignimbrite sheet covering "an area of 1700 km³ [sic]". The Smithsonian's listing for Uzon says the ignimbrite deposits "cover an area of 1700 sq km" and have a volume of 20-25 km³, so Ward's volume does seem to be badly wrong. If Ward's table incorporates errors of this magnitude, I wouldn't place too much reliance on it. --Avenue (talk) 11:55, 6 August 2010 (UTC)

Ok, I'll try to keep an eye on it. But I do not have the time and money to check all Ward's references :( --Chris.urs-o (talk) 17:10, 6 August 2010 (UTC)

• Braitseva et al. (1995), Leonov (2003), Fedotov+Masurenkov (1991), WEB1
  • "Ages of calderas, large explosive craters and active volcanoes in the Kuril-Kamchatka region, Russia". Bull. Volcanol. 57: 383–402. 1995. {{cite journal}}: Unknown parameter |authors= ignored (help)
  • "Quaternary calderas of Kamchatka Overview, classification, structural position". Volcanol. Seismol. (in Russian). 2: 13–26. 2003. {{cite journal}}: Unknown parameter |authors= ignored (help)
  • Active Volcanoes of Kamchatka. Vol. VI, 302 pp., VII, 415pp. Moscow: Nauka. 1991. {{cite book}}: Unknown parameter |authors= ignored (help)
• I do not habe access to these papers and I can't russian. --Chris.urs-o (talk) 10:58, 15 August 2010 (UTC)
• Never forget, Ward listed the eruptions just for its paper about world climate. He had probably problems too with data about the russian part of the Pacific Ring of Fire. --Chris.urs-o (talk) 15:50, 24 August 2010 (UTC)

Incomplete List

This article does not list the major eruptions that have occurred between the start of the Holocene and 1 C.E. Several VEI-7 eruptions such as the Minoan eruption of Santorini in about 1610 BCE and the Mazama eruption about 5700 BCE. As stated above, the Smithsonian's Global Volcanism Program web site has a page listing large Holocene eruptions: [2]. S Martin (talk) 08:51, 2 April 2010 (UTC)

There is a main template at the section begin ;) This list got too long. They are actually three lists (Timetable of major worldwide volcanic eruptions, List of Quaternary volcanic eruptions, and Large volume volcanic eruptions in the Basin and Range Province‎) and one sortable summary (List of large volcanic eruptions‎). The Minoan eruption and Mount Mazama are on the List of Quaternary volcanic eruptions‎ ;) --Chris.urs-o (talk) 10:38, 2 April 2010 (UTC)

Things were easier at the beginning. Wikipedia: Supervolcanoes, Volcanic Explosivity Index, Category:VEI-8 volcanoes, Category:VEI-7 volcanoes, and Category:VEI-6 volcanoes, GVP, and Mason, Ben G.; Pyle, David M.; Oppenheimer, Clive (2004). Then I got Peter Langdon Ward's table (2009), and things are more complicated now. A "never ending list" and many references. --Chris.urs-o (talk) 14:31, 3 April 2010 (UTC)

Hm.. ResMar 19:36, 16 August 2010 (UTC)

I notice that Krakatoa is vaguely suggested for Extreme_weather_events_of_535–536AD I don't see a listing an eruption at that time, is that just missed ? — Preceding unsigned comment added by EdwardLane (talk • contribs) 11:57, 26 May 2011 (UTC)

http://www.sciencedaily.com/releases/2009/12/091205105844.htm