Talk:Solar flare#Classification math

Flares have long been observed from stars other than the Sun (see flare stars) but we have no stand-alone article on xxx, xxx being flares or chromospheres or coronas or transition regions or any of the magnetically-linked atmospheric phenomena, in other stars ... the links to these phenomena are all to the "Solar xxx" articles. This hampers a badly-needed overhaul of stellar atmosphere which should at least mention these things more generally; as well as missing these subjects in their own right. — Preceding unsigned comment added by BSVulturis (talk • contribs) 20:51, 22 February 2019 (UTC)

In the Classification section there seems to be a mix-up of distances. It says:

"as measured by the GOES spacecraft at the Sun-Earth distance from the Sun of 2.7×10¹⁷ km."

But the Sun-Earth distance is:

Mean distance from Earth = 1 AU ≈ 1.496×10⁸ km

It seems that someone used the:

Mean distance from Milky Way core ≈ 2.7×10¹⁷ km ≈ 29,000 light-years

The two values differ by a 10⁹ factor. Rps (talk) 13:40, 29 October 2021 (UTC)

Is the list of flare-observing telescopes really necessary here? I think it all should be moved to Solar telescope, however, I'd like to hear others' thoughts on this before I move them. CoronalMassAffection (talk) 21:31, 19 November 2021 (UTC)

:Since no one has raised any objections, I have moved the info that was previously in the list to List of solar telescopes, Talk:List of solar telescopes, and to their respective articles if the info was not already there. CoronalMassAffection (talk) 03:45, 24 December 2021 (UTC)

Hi all. I have removed all four videos present in the article due to concerns over whether or not they conform to the W3C Web Content Accessibility Guidelines 2.2, specifically about [https://www.w3.org/TR/WCAG22/#seizures-and-physical-reactions seizures and physical reactions]. The videos in question are:

• [https://en.wikipedia.org/wiki/File:The_Best_Observed_X-class_Flare.ogv File:The Best Observed X-class Flare.ogv] (see onward from 0:35)
• [https://en.wikipedia.org/wiki/File:X-class_flare_Aug._9,_2011.ogv File:X-class flare Aug. 9, 2011.ogv]
• [https://en.wikipedia.org/wiki/File:NASA%27s_Fermi_Detects_the_Highest-Energy_Light_from_a_Solar_Flare.ogv File:NASA's Fermi Detects the Highest-Energy Light from a Solar Flare.ogv] (see clip starting at 0:50)
• [https://en.wikipedia.org/wiki/File:AR1515_Releases_X1.1_Class_Flare.ogv File:AR1515 Releases X1.1 Class Flare.ogv]

These flashes are produced as a result of SDO/AIA's automatic exposure-control algorithm, which avoids overexposure during flares by alternating between long and short exposures (noted in, for example, [http://dx.doi.org/10.1088/0004-637X/738/2/167 Schrijver et al 2011]). Displaying successive photos that were taken with different exposure times in the form of a video (as is done in the aforementioned files) will produce flashes, which is both a potential hazard and misleading to the viewer as to the nature of flares. I believe the former concern falls under WCAG 2.2 [https://www.w3.org/TR/WCAG22/#three-flashes-or-below-threshold Success Criterion 2.3.1 Three Flashes or Below Threshold], which requires the following.

:"Web pages do not contain anything that flashes more than three times in any one second period, or the flash is below the general flash and red flash thresholds."

Therefore, I have WP:BOLD removed the videos from the article and given my justification here, as it was too lengthy for the edit summary. Perhaps I am overreacting, but I think it is better to be safe than sorry when handling something like this.

Going forward, this flashing can be eliminated by normalizing by exposure time, and I hope to get to uploading some of these in the future. CoronalMassAffection (talk) 18:33, 29 December 2023 (UTC)

" at all wavelengths, from radio waves to gamma rays "

Which is it? all wavelengths or from radio waves to gamma rays? If it IS all wavelengths, the flare couldn't have a wavelength larger than the sun.

sorry if this is pedantic, I'm genuinely confused. proud advocate of pirate speak wikipedia (talk) 02:22, 24 May 2024 (UTC)

:I agree that "at all wavelengths" is too ambiguous and have removed it ([https://en.wikipedia.org/w/index.php?title=Solar_flare&diff=prev&oldid=1225534211 dif]). CoronalMassAffection (talk) 01:50, 25 May 2024 (UTC)