Vertical Electric Currents in Active Regions: Calculation Methods and Relation to the Flare Index

2018 ◽  
Vol 58 (8) ◽  
pp. 1129-1135 ◽  
Author(s):  
Yu. A. Fursyak
Keyword(s):  
Active Regions ◽  
Calculation Methods ◽  
Electric Currents ◽  
Flare Index

scholarly journals Super-active regions in solar cycle 24

2015 ◽  
Vol 11 (S320) ◽  
pp. 309-314 ◽  
Author(s):  
Anqin Chen ◽  
Jingxiu Wang
Keyword(s):  
Solar Cycle ◽  
Active Regions ◽  
Total Solar Irradiance ◽  
Flare Activity ◽  
Solar Cycles ◽  
Solar Cycle 24 ◽  
Satisfactory Account ◽  
Current Cycle ◽  
Flare Index ◽  
Cycle 24

AbstractComparing with solar cycles 21-23, the level of solar activity in the current cycle is very low. So far, there have been only five SARs and 45 X class flares. The monthly smoothed total solar irradiance decreased sharply by 0.09% from the maximum of cycle 23 to the minima between cycles 23 and 24. In this contribution, we present new studies on SARs in Cycle 24. The SARs in the current cycle have relatively smaller flare index (Iflare) and composite vector field index (Icom) comparing with the SARs in cycles 22 and 23. There is a clearly linear relationship between Iflare and Icom. The emphasis of this contribution is put on the similarity and different behaviors of vector magnetic fields of the SARs in the current solar cycle and the previous ones. We try to get a satisfactory account for the general characteristics and relatively lower level of solar flare activity in Cycle 24.

scholarly journals Flows, Evolution of Magnetic Fields, and Flares

1993 ◽  
Vol 141 ◽  
pp. 323-332 ◽  
Author(s):  
Haimin Wang
Keyword(s):  
Magnetic Fields ◽  
Magnetic Structure ◽  
Solar Flares ◽  
Active Regions ◽  
Magnetic Polarity ◽  
Flux Emergence ◽  
Electric Currents ◽  
Magnetic Shear ◽  
Before And After

AbstractThis paper reviews observations on the evolution of magnetic fields and flows in active regions which produce major flares. It includes the following topics: (1) Relationship between magnetic shear and flares; (2) Relationship between electric currents and flares; (3) Flows in active regions, particularly the emergence of new flux inside sheared penumbrae, and the mixed magnetic polarity nature of this kind of flux emergence; and (4) Changes of magnetic structure immediately before and after major solar flares; in particular, I will describe some recent findings that shear may increase after major flares.

scholarly journals Distributed Electric Currents in Solar Active Regions

Solar Physics ◽  
2020 ◽  
Vol 295 (2) ◽  
Author(s):  
Yuriy A. Fursyak ◽  
Alexander S. Kutsenko ◽  
Valentina I. Abramenko
Keyword(s):  
Active Regions ◽  
Electric Currents ◽  
Solar Active Regions

Dynamics of Electric Current’s Parameters in Active Regions on the Sun and Their Relation to the Flare Index

Astrophysics ◽  
2020 ◽  
Vol 63 (2) ◽  
pp. 260-273
Author(s):  
Yu. A. Fursyak ◽  
V. I. Abramenko ◽  
A. S. Kutsenko
Keyword(s):  
Active Regions ◽  
The Sun ◽  
Flare Index

scholarly journals Density Distribution of Photospheric Vertical Electric Currents in Flare-Active Regions of the Sun

Astrophysics ◽  
2020 ◽  
Vol 63 (3) ◽  
pp. 408-420
Author(s):  
I. V. Zimovets ◽  
A. B. Nechaeva ◽  
I. N. Sharykin ◽  
W. Q. Gan
Keyword(s):  
Density Distribution ◽  
Active Regions ◽  
The Sun ◽  
Electric Currents

Electric currents and H? emission in two active regions on the sun

Solar Physics ◽  
1991 ◽  
Vol 134 (2) ◽  
pp. 287-297 ◽  
Author(s):  
V. I. Abramenko ◽  
S. I. Gopasyuk ◽  
M. B. Ogir'
Keyword(s):  
Active Regions ◽  
The Sun ◽  
Electric Currents

The morphology of flare phenomena, magnetic fields, and electric currents in active regions. I - Introduction and methods

1993 ◽  
Vol 411 ◽  
pp. 362 ◽  
Author(s):  
Richard C. Canfield ◽  
J.-F. de La Beaujardiere ◽  
Yuhong Fan ◽  
K. D. Leka ◽  
A. N. McClymont ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Active Regions ◽  
Electric Currents
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