An emerging flux model for the solar flare phenomenon

1977 ◽  
Vol 216 ◽  
pp. 123 ◽  
Author(s):  
J. Heyvaerts ◽  
E. R. Priest ◽  
D. M. Rust
Keyword(s):  
Solar Flare ◽  
Flare Phenomenon ◽  
Flux Model

Force-Free Equilibria, Solar Flares and Coronal Transients

1979 ◽  
Vol 44 ◽  
pp. 174-178 ◽  
Author(s):  
J. Heyvaerts ◽  
J.M. Lasry ◽  
M. Schatzman ◽  
P. Witomsky
Keyword(s):  
Solar Flare ◽  
Solar Corona ◽  
Solar Flares ◽  
Magnetic Energy ◽  
Flare Phenomenon

The solar flare phenomenon is due to the sudden dissipation of magnetic energy in the solar corona. Growing evidence shows that flares may occur in closed magnetic configurations, and that photospheric shearing motions are essential in triggering the phenomenon. This prompted several authors (Lew, 1977; Jockers, 1977; Birn and Schindler, 1978, the present authors), to study the properties of magnetic configurations able to exist in the solar corona. Flares often occur in long “arcades of loops”, and this suggests as a first step a simplification of the problem by considering 2-dimensional structures

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

HIGH DIELECTRONIC SATELLITE LINES IN SOLAR FLARE SPECTRA

1979 ◽  
Vol 40 (C1) ◽  
pp. C1-98-C1-101
Author(s):  
L. Steenman-Clark ◽  
F. Bely Dubau ◽  
J. Dubau ◽  
P. Faucher ◽  
A. H. Gabriel ◽  
...  
Keyword(s):  
Solar Flare ◽  
Dielectronic Satellite

Observations for the Role of Flux rope Eruption in a Geoeffective Solar Flare

2014 ◽  
Vol 4 (2) ◽  
pp. 555-564
Author(s):  
A.M Aslam
Keyword(s):  
Solar Flare ◽  
Flux Rope ◽  
Magnetic Configuration ◽  
Solar Dynamics Observatory ◽  
Multi Wavelength ◽  
Solar Dynamics ◽  
Halo Coronal Mass Ejection ◽  
Mass Ejection ◽  
The Waves

On September 24, 2011 a solar flare of M 7.1 class was released from the Sun. The flare was observed by most of the space and ground based observatories in various wavebands. We have carried out a study of this flare to understand its causes on Sun and impact on earth. The flare was released from NOAA active region AR 11302 at 12:33 UT. Although the region had already produced many M class flares and one X- class flare before this flare, the magnetic configuration was not relaxed and still continued to evolve as seen from HMI observations. From the Solar Dynamics Observatory (SDO) multi-wavelength (131 Ã…, 171 Ã…, 304 Ã… and 1600Ã…) observations we identified that a rapidly rising flux rope triggered the flare although HMI observations revealed that magnetic configuration did not undergo a much pronounced change. The flare was associated with a halo Coronal Mass Ejection (CME) as recorded by LASCO/SOHO Observations. The flare associated CME was effective in causing an intense geomagnetic storm with minimum Dst index -103 nT. A radio burst of type II was also recorded by the WAVES/WIND. In the present study attempt is made to study the nature of coupling between solar transients and geospace.

A Study of the Evolution of Solar Active Regions for Improving Solar Flare Forecasts

1989 ◽  
Author(s):  
Patricia L. Bornmann ◽  
Darren Kalmbach ◽  
David Kulhanek ◽  
April Casale
Keyword(s):  
Solar Flare ◽  
Active Regions ◽  
Solar Active Regions
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