E3S Web Conf.
Volume 127, 2019X Anniversary International Conference “Solar-Terrestrial Relations and Physics of Earthquake Precursors”
|Number of page(s)||6|
|Section||Geophysical Fields and their Interactions|
|Published online||05 November 2019|
Cosmic rays as an indicator of the geoeffectiveness of magnetic clouds
Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy, SB RAS, 31 Lenin Ave., Yakutsk, Russia
1 Corresponding author: email@example.com
Geomagnetic storms are initiated by organized magnetic structures of the solar wind. The intensity of magnetic storms is determined by the product of the southward component of the magnetic field and the time interval, during which the structure is located near Earth: the larger the product, the higher the storm intensity. To determine the local properties of the structures, direct spacecraft measurements of the plasma and magnetic field characteristics are used. Global properties of the structures are also of great interest. Such information can be obtained using measurements of cosmic rays by the worldwide network of neutron monitors. Magnetic clouds are examples of these structures. About 30% of magnetic storms are caused by magnetic clouds. In our theory of the formation of Forbush decrease in a magnetic cloud, it has been found that the components of the vector anisotropy in time are determined by the magnetic cloud type. Thus, using the cosmic ray method, it is possible to determine a connection between the magnetic cloud type and the intensity of the magnetic storm. Similar connections can be made for other magnetic structures.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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