Ester89 Posted February 28 Share Posted February 28 The slow rise of the x-ray flux during the recent flare in the 3590 region leads me to wonder... what was the longest flare on record? Is there a flare duration ranking? 2 Link to comment Share on other sites More sharing options...
Popular Post Vancanneyt Sander Posted February 28 Popular Post Share Posted February 28 Perhaps the M2.54 on July 17th 2012 (around 7 hours) 1 4 Link to comment Share on other sites More sharing options...
tniickck Posted February 28 Share Posted February 28 check out M-flare on 14 Oct 2014, about 17 hours 1 2 Link to comment Share on other sites More sharing options...
Vancanneyt Sander Posted February 28 Share Posted February 28 7 minuten geleden, tniickck zei: check out M-flare on 14 Oct 2014, about 17 hours Only SWPC didn’t agree with that 😜 Link to comment Share on other sites More sharing options...
tniickck Posted February 28 Share Posted February 28 24 minutes ago, Vancanneyt Sander said: Only SWPC didn’t agree with that 😜 I thought i should count the other way. 5 hours is good though Link to comment Share on other sites More sharing options...
Ester89 Posted February 29 Author Share Posted February 29 10 hours ago, tniickck said: check out M-flare on 14 Oct 2014, about 17 hours 10 hours ago, Vancanneyt Sander said: Only SWPC didn’t agree with that 😜 Why was it not considered that way by SWPC? Looking at the x-ray flow from October 14-15, 2014 in the archive, I would have said that the flare lasted at least 12 hours @Vancanneyt Sander @tniickck Thanks for the answers Link to comment Share on other sites More sharing options...
Solution Popular Post Aten Posted February 29 Solution Popular Post Share Posted February 29 (edited) It depends on how you measure the length of a flare. I'm not sure the longest based on how SWPC measures length. If you go by amount of time above M or X levels, I think the August 16 1989 flare might be the longest. This flare saturated the the GOES x-ray sensor at X11.8 for 32 minutes and was likely an X20+ flare. X-ray levels remained above X levels for 2 hours 38 minutes and above M levels for over 13 hours. This flare might be a good candidate for the most powerful flare of the GOES era in terms of total energy released. While it almost certainly had a lower peak than the November 4 2003 flare, it had a much longer duration. Edited February 29 by Aten 3 1 2 Link to comment Share on other sites More sharing options...
Maitreya Posted February 29 Share Posted February 29 Дорогие друзья, вас не обеспокоили странные "провалы" солнечной активности последние три дня: 27.28.29 февраля 2024 года, когда уровень падал до "A"? Я привыкла видеть всплески, поднимающиеся от условного уровня "C" и выше к "M" и "X", но такие странные повторяющиеся падения до уровня "B" и "A" наблюдаю впервые за мою личную "историю наблюдений" - то есть за последние 4 года. Что Вы думаете об этом, дорогие друзья? Link to comment Share on other sites More sharing options...
Marcel de Bont Posted February 29 Share Posted February 29 38 minuten geleden, Maitreya zei: Дорогие друзья, вас не обеспокоили странные "провалы" солнечной активности последние три дня: 27.28.29 февраля 2024 года, когда уровень падал до "A"? Я привыкла видеть всплески, поднимающиеся от условного уровня "C" и выше к "M" и "X", но такие странные повторяющиеся падения до уровня "B" и "A" наблюдаю впервые за мою личную "историю наблюдений" - то есть за последние 4 года. Что Вы думаете об этом, дорогие друзья? Welcome Maitreya, I have approved your post but be aware we only use English in this forum. I am not going to Google Translate your question, just a reminder from now on please post in English. Link to comment Share on other sites More sharing options...
Maitreya Posted February 29 Share Posted February 29 OK, my friend Marcel. I understand. I am glad to meet you, my friend. Link to comment Share on other sites More sharing options...
tniickck Posted February 29 Share Posted February 29 1 hour ago, Maitreya said: Дорогие друзья, вас не обеспокоили странные "провалы" солнечной активности последние три дня: 27.28.29 февраля 2024 года, когда уровень падал до "A"? Я привыкла видеть всплески, поднимающиеся от условного уровня "C" и выше к "M" и "X", но такие странные повторяющиеся падения до уровня "B" и "A" наблюдаю впервые за мою личную "историю наблюдений" - то есть за последние 4 года. Что Вы думаете об этом, дорогие друзья? они не странные, просто снижение фоновой активности из-за убывания групп пятен. такое часто было в прошлом году и ранее they are not strange, just the activity lowers due to the spots disappearing. that happened last year and earlier 4 hours ago, Aten said: It depends on how you measure the length of a flare. I'm not sure the longest based on how SWPC measures length. If you go by amount of time above M or X levels, I think the August 16 1989 flare might be the longest. This flare saturated the the GOES x-ray sensor at X11.8 for 32 minutes and was likely an X20+ flare. X-ray levels remained above X levels for 2 hours 38 minutes and above M levels for over 13 hours. This flare might be a good candidate for the most powerful flare of the GOES era in terms of total energy released. While it almost certainly had a lower peak than the November 4 2003 flare, it had a much longer duration. where did you get this graph Link to comment Share on other sites More sharing options...
Maitreya Posted February 29 Share Posted February 29 3 minutes ago, tniickck said: они не странные, просто снижение фоновой активности из-за убывания групп пятен. такое часто было в прошлом году и ранее в них нет ничего странного, просто активность снижается из-за исчезновения пятен. это происходило в прошлом году и ранее Thank you very much, my friend! Really, this happens every year. And I thank God for you for calming me down, my friend. Flowers for you) 1 Link to comment Share on other sites More sharing options...
Aten Posted February 29 Share Posted February 29 19 minutes ago, tniickck said: where did you get this graph https://www.polarlicht-vorhersage.de/goes-archive/ 3 Link to comment Share on other sites More sharing options...
Philalethes Posted February 29 Share Posted February 29 6 minutes ago, Aten said: https://www.polarlicht-vorhersage.de/goes-archive/ That's great to have access to, I've wondered if something like that existed before. Do you happen to know what the data source is? I see it goes back all the way to 1986, so I assume it's pulled from GOES data that has been archived somewhere else by NOAA. Link to comment Share on other sites More sharing options...
Aten Posted February 29 Share Posted February 29 20 minutes ago, Philalethes said: That's great to have access to, I've wondered if something like that existed before. Do you happen to know what the data source is? I see it goes back all the way to 1986, so I assume it's pulled from GOES data that has been archived somewhere else by NOAA. There is a lot of GOES data here: https://www.ncei.noaa.gov/data/goes-space-environment-monitor/access/avg/ 1 Link to comment Share on other sites More sharing options...
Maitreya Posted February 29 Share Posted February 29 21 minutes ago, Philalethes said: Здорово иметь к ней доступ, я задавался вопросом, существовало ли что-то подобное раньше. Вы случайно не знаете, что это за источник данных? Я вижу, что она восходит к 1986 году, поэтому предполагаю, что она взята из данных GOES, которые были заархивированы где-то в другом месте NOAA. My friend, look at this https://xras.ru/sun_flares.html?m=4&d=12&y=2023 Link to comment Share on other sites More sharing options...
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