2021 Geomagnetic Storms

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Christopher K.
Posts: 5942
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

2021 Geomagnetic Storms

Post by Christopher K. »

Tuesday 2 March: G1
Wednesday 3 March: G1


Tony Phillips says yesterday saw a G2, the strongest geomagnetic storm of Solar Cycle 25, possible due to March being the most geomagnetically active month of the year. Today and tomorrow, a minor storm may be possible as solar wind is escaping from a hole in the Sun's atmosphere.

The hole:
https://www.spaceweather.com/images2021/27feb21/ch.jpg

More information:
https://www.spaceweather.com/repeat_ima ... inoxes.png
Christopher K.
Posts: 5942
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2021 Geomagnetic Storms

Post by Christopher K. »

Saturday 6 March: G1

G1 is the weakest SWPC classification of geomagnetic storm. During a G1, the following could occur...
*weak power grid fluctuations
*possible minor impact on satellite operations
*migratory animals are affected
*aurora is visible at high latitudes

Active Regions 2806 and 2807 are still available for view. According to Tony Phillip's count, fifty-one percent of this year's days have been spotless.
Christopher K.
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Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2021 Geomagnetic Storms

Post by Christopher K. »

Saturday 13 March: G1

NOAA is saying a "co-rotating interaction region" may strike Earth's magnetic field this Saturday. CIRs are middling areas between slow- and fast-moving streams of solar wind. Solar wind plasma can build up in a CIR. When this occurs, a "fake" CME can cause bright auroras at higher Northern latitudes.
Christopher K.
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Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2021 Geomagnetic Storms

Post by Christopher K. »

Saturday 20 March: G1

NOAA says a high stream of solar wind may hit the Earth's atmosphere Saturday or Sunday. This storm alert is happening simultaneously with the appearance of Active Region 2810, which at the time is more plage than sunspot.
Christopher K.
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Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2021 Geomagnetic Storms

Post by Christopher K. »

Wednesday 16 June: G1
Thursday 17 June: G1


There seems to be a pattern increasing in rate of occurrence recently: at least one sunspot rotating from around the back of the Sun, or the Sun giving birth to one before our eyes, as the previous sunspot rotates away or dies.
Christopher K.
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Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2021 Geomagnetic Storms

Post by Christopher K. »

Monday 27 September: G2
Tuesday 28 September: G1


These alerts are in response to a CME that will not outright strike the Earth, but is passing close. There is a fifty-five percent chance of no storm. If a G2 condition comes, power systems in some latitudes closer to the poles may experience voltage alarms.
Christopher K.
Posts: 5942
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2021 Geomagnetic Storms

Post by Christopher K. »

Monday 11 October: G2
Tuesday 12 October: G2


Well! The latest data crunching shows that the 9 October CME (which has a concurrent M1 flare) will hit the Earth late tonight or early tomorrow...
https://www.swpc.noaa.gov/news/g2-moder ... 2-oct-2021
rose48
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Joined: November 2nd, 2021, 12:06 pm

Re: 2021 Geomagnetic Storms

Post by rose48 »

Christopher K. wrote: October 11th, 2021, 3:12 pm Monday 11 October: G2
Tuesday 12 October: G2


Well! The latest data crunching shows that the 9 October CME (which has a concurrent M1 flare) will hit the Earth late tonight or early tomorrow...
https://www.swpc.noaa.gov/news/g2-moder ... 2-oct-2021
Not clear on the effect it causes
Christopher K.
Posts: 5942
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2021 Geomagnetic Storms

Post by Christopher K. »

Thursday 4 November: G1

This upcoming possible geomagnetic storm comes in tandem with three active regions on the Earth-facing side of the Sun. We've been encountering some G2s as well, which is the second-weakest classification. A G2 can cause...
*transformer damage at high latitudes
*recalculation of predicted satellite orbits
*aurora as low as New York and Idaho
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