MODULATION EFFECT OF MAGNETIC COROTATING TRAP ON 27-DAY COSMIC RAY VARIATION IN NOVEMBER–DECEMBER 2014
Journal Title: Solar-Terrestrial Physics - Year 2019, Vol 5, Issue 1
Abstract
We study the 27-day cosmic-ray (CR) intensity variation occurring in November–December 2014, using ground-based measurements from the worldwide network of neutron monitors and GOES-15 satellites. A determining factor in the considerable difference between amplitudes of the 27-day CR variation in November–December 2014 is shown to be significant changes in energy losses taking place when particles move in regular heliospheric electromagnetic fields. In this period, there was a long-living corotating trap produced by a vast coronal hole in the south of the Sun in interplanetary space. Configuration of this trap induced the energy loss of ~3–20 GeV CRs, due to which ground-based neutron monitors recorded an abnormally large amplitude of the 27-day variation.
Authors and Affiliations
Sdobnov V. E. , Kravtsova M. V. , Olemskoy S. V.
Keywords
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- EP ID EP700249
- DOI 10.12737/stp-51201902
- Views 120
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