Talk:Supervolcano

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thread_title:  A Commons file used on this page or its Wikidata item has been nominated for deletion 

message: There does not exist a consensual definition of "Supervolcano" or "Supereruption" in literature. Proposed definitions, however, do exist but not necessarily adopted in all studies. Here's two:
1) Supervolcano is a volcano that has had an explosive eruption with VEI = 8 (i.e. volume of deposits ≥ 1000 km3). For example, de Silva 2008 and USGS Q&A page
2) Supervolcano as that has had an explosive eruption with Magnitude ≥ 8.0 (i.e. mass of deposits ≥ 10^15 kg). For example, Geological society working group, Self 2006, Miller & Wark 2010, Bryan et al 2010, Wilson et al 2021, de Silva and Self 2022
Magnitude (M) is calculated as follow:
M = log10(mass of deposits in kg) - 7
The second definition is far more popular among volcanologists who studies large eruptions. Also noted, the VEI classification creator, Stephen Self, no longer uses VEI≥8 as the supervolcano criteria. Stephen Self has adopted M≥8.0 as supervolcano criteria in this recent paper.
It is imperative for this page to at least include both definitions.
The table is also confusing. The table header says bulk volume while most volumes included are DRE/magma volume. Best to separate them into two columns Aleral Wei (talk) 21:31, 29 January 2023 (UTC)
thread_title:  Definition of supervolcano, VEI, magnitude 

message: I think someone already flagged it, but the terminology subsection needs to be updated. Quote from the source someone had already put there: (https://www.wired.com/2013/10/the-rise-of-supervolcano/)
"But when does it get into the geologic literature? It takes a while although it gets used in other disciplines. In 2001, the word shows up in journal articles from Near East Archeology (referring to Toba) and *Journal of Radioanalytical and Nuclear Chemistry *(referring to Yellowstone, for what might be the first time). Also, the popular press book *Volcanoes *by Peter Clarkson uses it to talk about massive eruptions in Idaho. However, it isn't until 2002 that it shows up in geologic literature, again, starting with asteroid impact theory (namely, alternatives). C.R. Chapman uses the term in a Geological Society of America publication called "Impact lethality and risks in today's world: Lessons for interpreting Earth history" and a paper in The Holocene refers to a supervolcano when discussing European bog oaks of all things, but does so to refer back to Keys' ideas of a volcanic eruption in 535 A.D. Neither of these actually define a "supervolcano," but rather just mention them offhandedly.
In fact, the first truly geologic publication focused on a "supervolcano" that can be found in Google Scholar is from 2002 by the infamous R.B. Trombley discussing prediction of eruptions at Yellowstone. Trombley was an amateur geologist who made his "Southwest Volcano Research Centre" seem like a major research center when it was really his trailer. He duped people into buying his false "eruption prediction" software and was interviewed during the eruption of Eyjafjallajökull. It was then when it was found out that he was a fraud. That being said, he attributes "supervolcano" to a BBC documentary in 2000, likely based on Keys' Catastrophe book. So, the use of "supervolcano" in geology was launched, in a sense, by one of its greatest frauds."
It would be good to update the terminology page with this, or a shortened version as apposed to just stating "More than fifty years after Byers' review was published, the term supervolcano was popularised by the BBC popular science television program Horizon in 2000, referring to eruptions that produce extremely large amounts of ejecta" as it is misleading Berg998 (talk) 02:24, 15 September 2023 (UTC)
thread_title:  Terminology