Talk:Cumbre Vieja tsunami hazard/GA1

GA Review

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Good Article review progress box Criteria: 1a. prose () 1b. MoS () 2a. ref layout () 2b. cites WP:RS () 2c. no WP:OR () 2d. no WP:CV () 3a. broadness () 3b. focus () 4. neutral () 5. stable () 6a. free or tagged images () 6b. pics relevant () Note: this represents where the article stands relative to the Good Article criteria. Criteria marked are unassessed

Reviewer: Destroyeraa (talk· contribs) 16:11, 21 September 2020 (UTC)

Lede

• For the first sentence, add volcanic before La Palma, since you go on to compare this to other volcanic islands.

  "volcanic La Palma" implies that there is such a thing as non-volcanic La Palma. There isn't, so I wouldn't use that term. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

• @Jo-Jo Eumerus: I mean add volcanic before island. ~ Destroyeraa🌀 18:58, 21 September 2020 (UTC)

• Don't use informal language like "gigantic". Use words like "extensive" or "large".

  Done. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

• How rare are landslides in the Atlantic Ocean? You only compare this to Pacific islands.

  Sources don't say. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

• Who is Ward and Day? It will be helpful if you link it.

  The authors of the publication that kicked off the whole hypothesis. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

• I suggest you either link Ward and Day or explain with a few words what Ward and Day is. For example, Ward and Day, scientists of the University of California, ... ~ Destroyeraa🌀 19:25, 21 September 2020 (UTC)

• Expanded this a bit. Jo-Jo Eumerus (talk) 09:13, 22 September 2020 (UTC)

• Since this article is only about Cumbre Vieja, the last sentence - "Other volcanoes across the world are also at risk of causing such tsunamis." is unnecessary unless you wish to write an article about all the tsunami threats around the world.

  That's mostly additional info. The Cumbre Vieja hypothesis has informed research on similar dangers elsewhere. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

• You need to incorporate what you just said into the article. You need to say in the lede how the the Cumbre Veija research affected research of other volcanoes. ~ Destroyeraa🌀 19:25, 21 September 2020 (UTC)

• Hrmm. It doesn't seem like many sources are explicitly saying so. Jo-Jo Eumerus (talk) 09:13, 22 September 2020 (UTC)

• Then I don't get why you are including so many examples of other volcanoes/earthquakes and tsunami threats if they don't (in some way) relate to this article and this subject. ~ Destroyeraa🌀 15:51, 22 September 2020 (UTC)

• They aren't that many examples, actually. Just these where sources are discussing them and Cumbre Vieja in the same context, really. Jo-Jo Eumerus (talk) 16:10, 22 September 2020 (UTC)

Sector collapses and tsunamis caused by them

• In this section, you mainly explained about Volcano collapses and tsunamis caused by them. However, you didn't mention much about Cumbre Vieja except in the second paragraph. You go on to list a bunch of earthquakes and tsunamis around the world. Remember what the title of the article is - Cumbre Vieja tsunami hazard. You may want to shorten this section so you don't take away much from the subject.

  Well, the article is principally about the hypothesis of a tsunami, so giving a bit more consideration to that aspect is warranted. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

OK. Carrying on...

• "Volcanoes grow in size and thus tend to eventually become unstable and collapse, generating landslides." Remove "tend to". The sentence feels weird to read with those words.

  Removed. Jo-Jo Eumerus (talk) 08:26, 26 September 2020 (UTC)

• "In the Hawaiian Islands, collapses with volumes of over 5,000 cubic kilometres (1,200 cu mi) have been identified." Is this really necessary, since this statistics seems trivial and doesn't relate to Cumbre Vieja or the Canary Islands.

  I don't agree. It's a comparator/contextual information and 5000 cubic kilometres is the largest such landslide known. Jo-Jo Eumerus (talk) 08:26, 26 September 2020 (UTC)

• "Appear to be the norm" - informal language.

  Changed, but I am not sure if the more formal language is better. Jo-Jo Eumerus (talk) 08:26, 26 September 2020 (UTC)

• Agadir Basin - red link.

  Not a problem IMO. Jo-Jo Eumerus (talk) 08:26, 26 September 2020 (UTC)

• "and was later re-dated to have occurred between 87,000±8,000 and 39,000±13,000 years ago." I suggest you add a note to what 87,000±8,000 and 39,000±13,000 mean, since some people do not know what they mean.

  I think it's clear enough that they bracket a timespan. Jo-Jo Eumerus (talk) 08:26, 26 September 2020 (UTC)

• @Jo-Jo Eumerus: Still, IMO a note won't hurt anyone. ~ Destroyeraa🌀 16:17, 30 September 2020 (UTC)

@Destroyeraa:Just a note, editing a ping into an already existing post doesn't work. I am not sure how to make the text any clearer about the fact that it's about a timespan. Jo-Jo Eumerus (talk) 16:32, 30 September 2020 (UTC)

@Jo-Jo Eumerus: Add a note explaining what 87,000±8,000 means. ~ Destroyeraa🌀 16:34, 30 September 2020 (UTC)

Added one but I am dubious about its usefulness. Jo-Jo Eumerus (talk) 18:02, 30 September 2020 (UTC)

Tsunami hazards

• I am a bit confused of what might generate the landslide, which will in turn generate the tsunami. You list both volcanoes and earthquakes. Is it both, or is it just one.

  Both can do it. Jo-Jo Eumerus (talk) 18:02, 30 September 2020 (UTC)

• You might want to fit this section with the "Potential impacts" section, since both talk about tsunami hazards. Especially the second paragraph in this subsection.

  I don't think that would make sense, as neither section goes into detail of what the impact of a tsunami on land is. Jo-Jo Eumerus (talk) 18:02, 30 September 2020 (UTC)

• You do say what some of the hazards say in the second paragraph. I still highly suggest you merge some of the paragraphs with the Potential Impacts section. ~ Destroyeraa🌀 21:14, 5 October 2020 (UTC)

• I still don't think that works, it's too generic for the Impacts section. Jo-Jo Eumerus (talk) 09:25, 6 October 2020 (UTC)

• Overall nothing much that needs fixing (grammar, etc.) in this subsection.

Regional Context: Cumbre Vieja and the Atlantic Ocean

• "It is the fastest growing volcano in the archipelago and thus dangerous in terms of collapses and landslides." Why is it dangerous?

  Fast-growing volcanoes tend to become top-heavy and unstable. Sources do not spell this out, seems like. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

Models

Ward and Day

• "In light of the behaviour of other documented sector collapses such as at Mount St. Helens, the headscarp of the unstable part of Cumbre Vieja is likely 2–3 kilometres (1.2–1.9 mi) east from the 1949 fault and the toe of the sector lies at 1–3 kilometres (0.62–1.86 mi) depth below sea level; this latter reconstruction is supported by bathymetric observations west of La Palma." This sentence is rather long, I suggest you remove "such as Mount St. Helens," to improve the flow of the sentence.

  Split. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

• What does "566,000 Cumbre Nueva landslide" mean?

  Specified. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

• A scenario of a collapse of 500 cubic kilometres (120 cu mi) that moves at a rate of about 100 metres per second (330 ft/s) on top of a layer of mud or landslide breccia, which lubricate its movement, and eventually spreads 60 kilometres (37 mi) to cover a jug-shaped area of 3,500 square kilometres (1,400 sq mi)... doesn't sound like a complete sentence.

  Yeah, amended. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

Other models

• Link hydrodynamic. If there is a subject on hydrodynamic modelling, please link it.

  Linked but I think it's going to be a redlink. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

• So another model was produced by Ward and Day in 2006?

  Yes, but only for a narrow area along the US coast. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

Overall, this section is well written

Criticism

Probability

• "Humanity has never witnessed gigantic collapses on La Palma" Again, too dramatic wording.

  Is there an alternative formulation?

  How about vast, extensive, expansive, or enormous. ~ Destroyeraa🌀 22:28, 14 October 2020 (UTC)

  @Destroyeraa:Done. Jo-Jo Eumerus (talk) 07:57, 15 October 2020 (UTC)

  @Jo-Jo Eumerus: Good. However, you still have Potential impacts to consider. ~ Destroyeraa🌀 12:34, 15 October 2020 (UTC)

  I admit that I am not sure what you mean... Jo-Jo Eumerus (talk) 16:42, 15 October 2020 (UTC)

  @Jo-Jo Eumerus: I mean that you need to expand the section, if there are reliable sources available. Currently, it is a little too short. Otherwise, consider merging the potential impacts section with the tsunami hazards section, since the tsunami hazards section needs more context about Cumbre Vieja. ~ Destroyeraa🌀 16:36, 16 October 2020 (UTC)

  Oh, that issue. Of the rigorous academic sources, very few discuss the impact such a tsunami would have, to my surprise. Jo-Jo Eumerus (talk) 19:15, 16 October 2020 (UTC)

• "and there is evidence that the western flank of La Palma is currently stable and a collapse in the near future unlikely." I would replace the "and" after "stable" with a "thus", since it is stable, a collapse isn't likely.

  I don't think that works, as I am not sure that the second statement is based on the first. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

• "extreme credible worst casescenario" Space.

  Corrected. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

Potential impact

I suggest you merge these short paragraphs with the "Tsunami hazards" subsection, since the tsunami hazards section needs more relation to the subject, which is Cumbre Vieja. Currently, this section is a bit too short.

Other volcanoes with such threats

Remember, this is about the threat to Cumbre Vieja, if you want to turn this into a "see also" section, there needs to be links to the other tsunami hazard pages.

There aren't such articles, this is more a contextual section. Jo-Jo Eumerus (talk) 21:10, 14 October 2020 (UTC)

References

References look good.

Overall

Overall, a well-written article that is very close to GA class, though some parts may be confusing to the reader. I'm sorry for taking so long on this review, Jo-Jo Eumerus. ~ Destroyeraa🌀 19:48, 12 October 2020 (UTC)

@Jo-Jo Eumerus: Very well. I'm rather surprised the models have little information about the actual impact, though if you find more information, I'm sure you'll add it. Thanks, and good job. ~ Destroyeraa🌀 00:28, 22 October 2020 (UTC)

Other volcanoes with such threats

• Remember the point of this article. It is to explain about the Cumbre Vieja tsunami hazard. A simple "See also" section will do.

  I don't think there are many articles about such threats elsewhere. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)

Overall, it is a bit unclear what this article is about. Is it to list and explain the different tsunami hazards in the world, or is it to explain the Cumbre Vieja tsunami hazard? If the subject is the former, then the article needs to be moved accordingly to the correct title and be less about the Cumbre Vieja. If the subject is the latter, then it needs to be clearer to the reader that the subject is the Cumbre Vieja volcano and threat.

The article is principally about Cumbre Vieja; some of the other information is mostly context. Jo-Jo Eumerus (talk) 18:41, 21 September 2020 (UTC)