faster328 Posted Saturday at 05:44 AM Share Posted Saturday at 05:44 AM (edited) This is old AR 5395 when it reached its peak size of 3600 MSH on March 17, 1989 (note that AR 5395 is the big region on the northwestern limb/top right), that is famous for the March 1989 geomagnetic storm: https://solarwww.mtk.nao.ac.jp/mitaka_solar/wl-fulldisk-photo/calendar/1989/jpg/wl19890317_001.jpg Please discuss anything about old AR 5395 and the March 1989 geomagnetic storm here. Edited Saturday at 05:53 AM by faster328 1 Link to comment Share on other sites More sharing options...
Manuel Posted Saturday at 06:24 AM Share Posted Saturday at 06:24 AM (edited) Damn! That spot was huge, no wonder it created such a powerful storm! Edited Saturday at 06:27 AM by Manuel 1 Link to comment Share on other sites More sharing options...
faster328 Posted Saturday at 06:37 AM Author Share Posted Saturday at 06:37 AM The reason behind the March 1989 geomagnetic storm is because AR 5395 has a β-γ-δ (beta-gamma-delta) magnetic configuration, which caused it to produce an X15 flare on the northeastern limb on March 6, 1989. 1 Link to comment Share on other sites More sharing options...
Popular Post Sunlive123 Posted Saturday at 07:29 AM Popular Post Share Posted Saturday at 07:29 AM 48 minutes ago, faster328 said: The reason behind the March 1989 geomagnetic storm is because AR 5395 has a β-γ-δ (beta-gamma-delta) magnetic configuration, which caused it to produce an X15 flare on the northeastern limb on March 6, 1989. 8 Link to comment Share on other sites More sharing options...
faster328 Posted Saturday at 08:44 AM Author Share Posted Saturday at 08:44 AM 1 hour ago, Sunlive123 said: This is the sunspot map and the β-γ-δ (beta-gamma-delta) magnetic configuration of AR 5395. Link to comment Share on other sites More sharing options...
faster328 Posted Saturday at 10:59 AM Author Share Posted Saturday at 10:59 AM (edited) AR 5395 is one of the largest sunspot regions on record; being the largest since 1976. Due to its large size and magnetic complexity, it produced an X15 (X21.5 for science quality data) on the northwestern limb on March 6, 1989. The March 6, 1989 flare is one of the largest on record since 1976. It could rival the X28.5 flare that occurred on April 2, 2001 and possibly the X45 flare that occurred on November 4, 2003. Edited Saturday at 11:00 AM by faster328 Link to comment Share on other sites More sharing options...
Aten Posted Saturday at 01:32 PM Share Posted Saturday at 01:32 PM Image of the CME of the March 6 1989 flare taken by the Solar Maximum Mission: Link to comment Share on other sites More sharing options...
faster328 Posted Sunday at 03:43 AM Author Share Posted Sunday at 03:43 AM 14 hours ago, Aten said: Image of the CME of the March 6 1989 flare taken by the Solar Maximum Mission: The CME knocked out power grids in Quebec just after March 9, 1989, when the CME arrived at Earth. Link to comment Share on other sites More sharing options...
SpaceWeather5464 Posted Sunday at 05:07 AM Share Posted Sunday at 05:07 AM 23 hours ago, faster328 said: This is old AR 5395 when it reached its peak size of 3600 MSH on March 17, 1989 (note that AR 5395 is the big region on the northwestern limb/top right), that is famous for the March 1989 geomagnetic storm: https://solarwww.mtk.nao.ac.jp/mitaka_solar/wl-fulldisk-photo/calendar/1989/jpg/wl19890317_001.jpg Please discuss anything about old AR 5395 and the March 1989 geomagnetic storm here. This storm was stronger than usual because it happened during equinox and cracks open in earth’s magnetic field during equinox. Link to comment Share on other sites More sharing options...
Aten Posted Sunday at 06:21 AM Share Posted Sunday at 06:21 AM 2 hours ago, faster328 said: The CME knocked out power grids in Quebec just after March 9, 1989, when the CME arrived at Earth. No, the Quebec power grid went down on March 13 due to different CMEs 2 Link to comment Share on other sites More sharing options...
faster328 Posted yesterday at 10:03 AM Author Share Posted yesterday at 10:03 AM https://solarscience.msfc.nasa.gov/greenwch/g1989.txt - look for 5395! Link to comment Share on other sites More sharing options...
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