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Initiation of CME and Associated Flare Caused by Helical Kink Instability Observed by SDO/AIA
Pankaj Kumar, K. -S. Cho, S. -C. Bong +2
In this paper, we present multiwavelength observations of helical kink instability as a trigger of a CME which occurred in AR NOAA 11163 on 24 February 2011. The CME was associated…
Transient induced MHD oscillations : A tool to probe the solar active regions
Abhishek K. Srivastava, V. M. Nakariakov, B. N. Dwivedi +1
Solar transients and eruptive phenomena which are ubiquitous in the solar atmosphere, can shed new light to the understanding of the outstanding problems like coronal heating and t…
On the Triggering of M-Class Solar Flare due to Loop-loop Interaction in AR NOAA 10875
Pankaj Kumar, Abhishek K. Srivastava, B. V. Somov +3
We present multiwavelength analysis of an M7.9 /1N solar flare which occurred on 27 April 2006 in AR NOAA 10875. The flare was triggered due to the interaction of two loop systems.…
Multi-Wavelength Observations of a Flux Rope Failed in the Eruption and Associated M-Class Flare from NOAA AR 11045
Pankaj Kumar, A. K. Srivastava, B. Filippov +2
We present the multi-wavelength observations of a flux rope that was trying to erupt from NOAA AR 11045 and the associated M-class solar flare on 12 February 2010 using space and g…
Multiwavelength Study on Solar and Interplanetary Origins of the Strongest Geomagnetic Storm of Solar Cycle 23
Pankaj Kumar, P. K. Manoharan, Wahab Uddin
We study the solar sources of an intense geomagnetic storm of solar cycle 23 that occurred on 20 November 2003, based on ground- and space-based multiwavelength observations. The c…
Observation of Kink Instability as Driver of Recurrent Flares in AR 10960
A. K. Srivastava, Pankaj Kumar, T. V. Zaqarashvili +3
We study the active region NOAA 10960, which produces two flare events (B5.0, M8.9) on 04 June 2007. We find the observational signature of right handed helical twists in the loop…