Abstract Details
| Name: Dr. Bimal Pande Affiliation: Kumaun. University Nainital Conference ID: ASI2015_690 Title : GEOEFFECTIVENESS OF SOLAR ERUPTIONS DURING THE RISING PHASE OF SOLAR CYCLE 24 Authors and Co-Authors : Bimal Pande(1), Seema Pande(2), Hema Bisht(2) &Ramesh Chandra(1) 1. Physics Department DSB Campus, Kumaun University, Nainital 2. MB Govt. P.G. College Haldwani Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : In the present paper we have studied the different statistical parameters responsible for the geoeffectiveness of the solar eruptions such as CME source locations on the solar surface, speed, width and flare association. We have taken a set of 191 halo coronal mass ejections (CMEs) of rising phase of cycle 24(Oct 2008-Dec 2013). Minimum Dst values occurring within 1-5 days after the CME onset were observed. We grouped the levels of geomagnetic activity into two groups on the basis of observed minimum Dst index i.e., first moderate (-50 Dst -100) and second intense (Dst -100). We studied the correlation between Dst indexes, CME speed and flare class. A low geomagnetic activity in the rising phase of solar cycle 24 is observed. During the given period, most of the events were dominated in the northern hemisphere. This shows the north-south asymmetry in the source region of geoeffective events. We also observed that most of the geoeffective events are either from central location or from western hemisphere, which confirms the earlier findings. |