Open AccessCriteria for early prediction of geomagnetic disturbances caused by coronal holes during periods of low solar activity based on muon flux variations
Author(s) -
N. V. Osetrova,
И. И. Астапов,
N. S. Barbashina,
A. Yu. Konovalova
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1690/1/012019
Subject(s) - hodoscope , cosmic ray , physics , solar wind , coronal mass ejection , earth's magnetic field , flux (metallurgy) , geomagnetic storm , coronal hole , interplanetary spaceflight , interplanetary magnetic field , heliosphere , astronomy , muon , astrophysics , solar flare , magnetic field , plasma , nuclear physics , materials science , quantum mechanics , metallurgy
Coronal holes generate a high speed solar wind. This wind is the cause of magnetic storms on the Earth during the years of low solar activity. Also a high speed solar wind creates disturbances in the interplanetary magnetic field. The disturbance may reflect cosmic rays hitting them in the direction of the Earth. As a result, it is possible to observe a change in the flux of cosmic rays on the Earth before the arrival of the disturbance. The paper identifies a criterion for early detection of cosmic ray flux increasing by the muon hodoscope URAGAN (MEPhI, Moscow) to coronal holes in years of decreased solar activity (2009-2010, 2018-2019). It was found that increases of cosmic ray intensity are visible before the main sequence of areas of increasing and decreasing cosmic ray intensities in GSE maps in 60% of the cases.