Role of recent major solar flare event on cosmic rays as well as on geomagnetic activity

摘要

The solar flare and complex eruption that took place during August 1, 2010 on nearly half the surfac surface of the sun was e alarming in the size of the surface area that was affected, being so immense and nearly unthinkable when comparing to the dim dimension ension of Earth. On August 1st, almost the entire Earth Earth-facing side of the sun erupted in a tumult of activity. Th There was a C3 ere C3-class solar flare, a solar tsunami, multiple filaments of magnetism lifting off the stellar surface, large large-scale shaking of the solar corona, radio bursts, a coronal mass ejection and more. The origin of the blast was sunspot 1092. At about th the same time, an enormous magnetic filament e stretching across the sun’s northern hemisphere erupted. One of the fastest CMEs in years was captured by the STEREO COR1 telescopes on August 1, 2010. This CME is seen to be heading towards Earth at speeds well o over 1000 kilometers per second. During ver this event neutron monitors have recorded a large decrease in cosmic ray intensity following the major solar flare. Our study tried to find out the role of this solar event on cosmic ray intensity variation along with large interplanetary changes. As a result, a large decrease in cosmic ray intensity and enhancements in the values of solar wind speed, total IMF B , Bz, Dst and Ap are ident identified. fied.