oemSpace Posted September 22, 2021 Share Posted September 22, 2021 Referring to following articles about sun's magnetic polarity, I would like to know on what current pole's direction of the Sun is at this moment. Would this pole's direction of the SUn directly effect IMF direction for solar storm? Does anyone have any suggestions? Thanks in advance "What is the reversal cycle of the sun's magnetic polarity (the solar magnetic activity cycle)? The magnetic north and south poles of the sun reverse once in about 11 years. The magnetic north pole at the beginning will become the magnetic south pole later. Similarly, the magnetic south pole at the beginning will become the magnetic north pole later. The sun's magnetic north and south poles will reverse twice and resume to their original positions in about 22 years. So, the reversal period of the sun's magnetic poles or magnetic field is about 22 years." http://www.weather.gov.hk/en/education/space-weather/general/00424-the-relationship-between-sunspot-activity-and-the-reversal-of-the-suns-magnetic-polarity.html Link to comment Share on other sites More sharing options...
Vancanneyt Sander Posted September 22, 2021 Share Posted September 22, 2021 2 uren geleden, oemSpace zei: I would like to know on what current pole's direction of the Sun is at this moment. The North Pole is currently positive field (+) and the South Pole negative field (-). When the 25th cycle ends it will be the opposite. 2 uren geleden, oemSpace zei: Would this pole's direction of the SUn directly effect IMF direction for solar storm? No, See our help section: The interplanetary magnetic field to learn more about the IMF. Also: read question 22 in our FAQ. The article you are referring to is just explaining the 11-year solar cycle and the 22-year magnetic cycle which is a normal thing. Link to comment Share on other sites More sharing options...
oemSpace Posted September 22, 2021 Author Share Posted September 22, 2021 (edited) 6 hours ago, Vancanneyt Sander said: The North Pole is currently positive field (+) and the South Pole negative field (-). When the 25th cycle ends it will be the opposite. Where to get this information? and I would like to know on when the 25th cycle ends. Referring to following statements, if currently positive field is North Pole (+), if solar flare occurs from North part of the Sun, would it usually carry north direction of the IMF? question 22 in our FAQ "No. The polarity of the interplanetary magnetic field and the north-south direction (Bz) of the interplanetary magnetic field are two very different things. While it is true that we speak of a negative Bz-value when the north-south direction of the interplanetary magnetic field turns southward it is in no way related to the polarity of the interplanetary magnetic field. The polarity of the interplanetary magnetic field is not important if you are only interested in knowing if there will be chance for aurora tonight. The north-south direction (Bz) of the interplanetary magnetic field is however a vital ingredient when it comes to auroral activity but this cannot be predicted. The north-south direction (Bz) of the interplanetary magnetic field is first known when it passes the DSCOVR satellite. From there it will take the solar wind only 30 to 60 minutes to arrive at Earth." Do you have any suggestions? Thank you very much for any suggestions (^v^) Edited September 22, 2021 by oemSpace Link to comment Share on other sites More sharing options...
Christopher S. Posted September 22, 2021 Share Posted September 22, 2021 Note: Reversal of polarity is not a change in vector. It is a change in relationship between charged particles. 'Positive' and 'negative' are co-dependent distinguishing terms. The IMF is comprised of various other types of particles doing more than imparting their charge, so to mirror what Vancanneyt said: the polarity is not a factor in solar storms as far as strength, frequency, etc. is concerned. We do not know if there is a quantum mechanical function to it yet, but regardless, the IMF only changes electromagnetic polarity and that's it. Link to comment Share on other sites More sharing options...
Vancanneyt Sander Posted September 22, 2021 Share Posted September 22, 2021 1 uur terug, oemSpace zei: Where to get this information? and I would like to know on when the 25th cycle ends. Magnetogram of the sun: red spots are negative polarity spots, blue are the positive polarity spots. Each sunspot region has a leading spot with the main polarity, in this 25th cycle we see that all regions have blue (positive +) leading spots in the northern hemisphere, the Southern Hemisphere the opposite (negative -). At the end of the 25th cycle we’ll start to see regions with opposite polarity indicating the 26th one will arrive when there are no longer 25th cycle spots. For an indication when to expect the next solar minimum, visit our solar cycle page. 1 Link to comment Share on other sites More sharing options...
3gMike Posted September 22, 2021 Share Posted September 22, 2021 10 hours ago, Vancanneyt Sander said: The North Pole is currently positive field (+) and the South Pole negative field (-). When the 25th cycle ends it will be the opposite. Is it true to say that the reversal of polarity at the poles occurs around Solar maximum? Link to comment Share on other sites More sharing options...
Vancanneyt Sander Posted September 22, 2021 Share Posted September 22, 2021 1 uur geleden, 3gMike zei: Is it true to say that the reversal of polarity at the poles occurs around Solar maximum? The reversal itself is indeed at solar maximum and marks the halfway point of the cycle. The polar fields will then have opposite polarity, but spots keep their leading polarity some info of the previous reversal can be read here: https://www.nasa.gov/content/goddard/the-suns-magnetic-field-is-about-to-flip/ 2 Link to comment Share on other sites More sharing options...
oemSpace Posted September 23, 2021 Author Share Posted September 23, 2021 (edited) 20 hours ago, Vancanneyt Sander said: Magnetogram of the sun: red spots are negative polarity spots, blue are the positive polarity spots. Each sunspot region has a leading spot with the main polarity, in this 25th cycle we see that all regions have blue (positive +) leading spots in the northern hemisphere, the Southern Hemisphere the opposite (negative -). At the end of the 25th cycle we’ll start to see regions with opposite polarity indicating the 26th one will arrive when there are no longer 25th cycle spots. For an indication when to expect the next solar minimum, visit our solar cycle page. Based on the 25th cycle, when any solar flare occurs in the northern hemisphere, would solar flare usually carry (positive +) as leaving the Sun? How do Earth's atmosphere react differently from (positive +) and (negative -)? Do you have any suggestions? Thanks, to everyone very much for any suggestions (^v^) Edited September 23, 2021 by oemSpace Link to comment Share on other sites More sharing options...
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