ABSTRACT
Chandrarchandra.ntl@gmail.com
Kumaun University, Nainital, India
| Title : | Study of Filament Eruption During 2015 March 14 —15 |
| Abstract | |
| We present here a filament eruption during 2014 March 14—15. The filament was located in NOAA AR 12297 and erupted in two steps. We use observations from the Atmospheric Imaging Assembly (AIA) and Heliospheric Magnetic Imager (HMI) instruments onboard the Solar Dynamics Observatory (SDO), and from the Solar and Heliospheric Observatory (SOHO) Large Angle and Spectrometric Coronagraph (LASCO). We also use Hα data from the Global Oscillation Network Group (GONG) telescope. The filament shows a first step eruption on 14 March 2015 and it stops its rise at a projected altitude ≈125 Mm on the solar disk. It remains at this height for ≈12 hrs. Finally it erupts on 15 March 2015 and produces a halo CME and the largest geomagnetic storm of Solar Cycle 24. The decay index is calculated to understand this two-step eruption. The two step filament eruption was due to the presence of successive instability–stability–instability zones. | |
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