scholarly journals Microwave burst with fine spectral structures in a solar flare on 2011 August 9

2012 ◽  
Vol 55 ◽  
pp. 251-255
Author(s):  
B.L. Tan ◽  
C.M. Tan ◽  
Y.Y. Liu
Keyword(s):  
Solar Flare ◽  
Microwave Burst

scholarly journals On the Thermalisation of Flare-Time Energetic Electrons Observed at Radio and X-Ray Wavelengths

1980 ◽  
Vol 91 ◽  
pp. 223-226
Author(s):  
S. S. Degaonkar ◽  
H. S. Sawant ◽  
R. V. Bhonsle
Keyword(s):  
Solar Flare ◽  
Energetic Electrons ◽  
Gradual Rise ◽  
X Ray ◽  
Slow Decay ◽  
Microwave Burst ◽  
Long Duration ◽  
Microwave Bursts

An interesting microwave event at 2800 MHz was recorded at Ahmedabad on September 19, 1977 at 1026 UT at the same time as the H-Alpha solar flare of importance 3B. The microwave burst was of impulsive nature, with as many as twenty impulses in seventy minutes with a quasi-periodicity of 1 to 5 minutes. An X-ray burst recorded by GOES Satellite in 1-8A band showed at the same time a smooth soft X-ray profile with apparently no sign of hard X-ray bursts. This indicates that the acceleration of discrete electron streams which produced impulsive microwave bursts was not sufficient to produce the hard X-ray component but got thermalised to produce soft X-ray emission, with a gradual rise and a slow decay covering a long duration of more than 2 1/2 hours.

Microwave burst spectra and solar flare magnetic fields

Solar Physics ◽  
1977 ◽  
Vol 54 (1) ◽  
pp. 165-168 ◽  
Author(s):  
Donald F. Neidig
Keyword(s):  
Magnetic Fields ◽  
Solar Flare ◽  
Microwave Burst

Microwave burst timescales and solar flare acceleration processes

1994 ◽  
Vol 90 ◽  
pp. 683 ◽  
Author(s):  
A. Krueger ◽  
B. Kliem ◽  
J. Hildebrandt ◽  
V. V. Zaitsev
Keyword(s):  
Solar Flare ◽  
Microwave Burst

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

Conventional solar flare theory re-examined

1997 ◽  
Vol 4 (5) ◽  
pp. 1929-1935 ◽  
Author(s):  
R. N. Sudan ◽  
D. S. Spicer
Keyword(s):  
Solar Flare
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