scholarly journals TWIST AND CONNECTIVITY OF MAGNETIC FIELD LINES IN THE SOLAR ACTIVE REGION NOAA 10930

2011 ◽  
Vol 738 (2) ◽  
pp. 161 ◽  
Author(s):  
S. Inoue ◽  
K. Kusano ◽  
T. Magara ◽  
D. Shiota ◽  
T. T. Yamamoto
Keyword(s):  
Magnetic Field ◽  
Active Region ◽  
Solar Active Region ◽  
Active Region Noaa ◽  
Region Noaa ◽  
Field Lines

scholarly journals Reconstruction of the Coronal Magnetic Field for Active Region NOAA 8151

2001 ◽  
Vol 203 ◽  
pp. 441-443
Author(s):  
S. Régnier ◽  
T. Amari
Keyword(s):  
Magnetic Field ◽  
Active Region ◽  
Magnetic Energy ◽  
Coronal Magnetic Field ◽  
X Rays ◽  
Active Region Noaa ◽  
Filament Eruption ◽  
Linear Force ◽  
Region Noaa ◽  
Field Lines

The active region NOAA 8151 observed between February 11–13, 1998 exhibits a filament eruption linked to the disappearance of a sigmoidal structure. Using vector magnetograms from IVM (Mees Observatory, Hawaii), we perform a non linear force-free reconstruction of the coronal magnetic field above this active region. This reconstruction allows to determine the distribution of electric currents, the magnetic energy and the relative magnetic helicity. The reconstructed magnetic field lines are compared to the soft X-rays (SXT, Yohkoh) observations.

scholarly journals Coordinate flares observed by TRACE

2012 ◽  
Vol 8 (S294) ◽  
pp. 547-548
Author(s):  
Defang Kong ◽  
Xiaoli Yan ◽  
Zhike Xue
Keyword(s):  
Magnetic Field ◽  
Active Region ◽  
Potential Fields ◽  
Active Region Noaa ◽  
Clockwise Rotation ◽  
X Ray ◽  
Region Noaa ◽  
Field Lines ◽  
Rotation Motion

AbstractTwo flares occurred simultaneously in active region NOAA 9433 on 2001 April 25. The GOES X-ray fluxes show only one peak during the two flares. The negative magnetic polarities in the two flaring regions exhibited a clockwise rotation motion around the positive polarities, which can be seen from the evolution of the SOHO/MDI magnetograms. Through analyzing the potential fields extrapolated from the MDI magnetogram, we find that there is a channel strode by a group of magnetic field lines connecting the two flaring regions.

A Rapidly Evolving Active Region NOAA 8032 observed on April 15th, 1997

2000 ◽  
Vol 179 ◽  
pp. 233-236
Author(s):  
Shibu K. Mathew ◽  
Ashok Ambastha
Keyword(s):  
Magnetic Field ◽  
Active Region ◽  
Field Configuration ◽  
Active Region Noaa ◽  
Magnetic Field Configuration ◽  
X Ray ◽  
Field Gradients ◽  
Magnetic Field Gradients ◽  
Region Noaa ◽  
Field Lines

AbstractThe active region NOAA 8032 of April 15, 1997 was observed to evolve rapidly. The GOES X-ray data showed a number of sub-flares and two C-class flares during the 8–9 hours of its evolution. The magnetic evolution of this region is studied to ascertain its role in flare production. Large changes were observed in magnetic field configuration due to the emergence of new magnetic flux regions (EFR). Most of the new emergence occured very close to the existing magnetic regions, which resulted in strong magnetic field gradients in this region. EFR driven reconnection of the field lines and subsequent flux cancellation might be the reason for the continuous occurrence of sub-flares and other related activities.

Characteristics of Soft X-Ray Radiation of the Solar Active Region NOAA 1024 Registered by the PINGVIN-M Device in July 2009

2020 ◽  
Vol 60 (7) ◽  
pp. 936-941
Author(s):  
M. I. Savchenko ◽  
P. V. Vatagin ◽  
P. B. Dmitriev ◽  
M. G. Ogurtsov ◽  
E. M. Kruglov ◽  
...  
Keyword(s):  
Active Region ◽  
Solar Active Region ◽  
Active Region Noaa ◽  
X Ray ◽  
Region Noaa

scholarly journals Features of Microwave Radiation and Magnetographic Characteristics of Solar Active Region NOAA 12242 Before the X1.8 Flare on December 20, 2014

2017 ◽  
Vol 57 (8) ◽  
pp. 978-987 ◽  
Author(s):  
V. E. Abramov-Maximov ◽  
V. N. Borovik ◽  
L. V. Opeikina ◽  
A. G. Tlatov ◽  
L. V. Yasnov
Keyword(s):  
Active Region ◽  
Microwave Radiation ◽  
Solar Active Region ◽  
Active Region Noaa ◽  
Region Noaa
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