PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Solar & Heliospheric Physics (SH)
Cosmic-Ray Modulation in relation to Solar and Heliospheric Parameters
S. Singh
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Pre-published on: August 05, 2023
Published on:
Abstract
The behaviour of several solar activity indices and heliospheric characteristics over the solar cycle 24 is compared to long-term fluctuations in cosmic rays. Before, the linear combination of the sunspot number, the solar cycles 22, 23, and 24's cosmic ray intensity, the number of group solar flares, and the geomagnetic indices Ap, Kp and aa. We observed the relationships between solar-heliospheric variables, such as the interplanetary magnetic field, coronal mass ejections, the tilt of the heliospheric current sheet, and cosmic-ray modulation, after applying this model to the current solar cycle, which is marked by many peculiarities and extreme solar events. By analysing monthly cosmic-ray data from the Neutron Monitor Stations of Oulu (0.81 GV), Beijing (cutoff rigidity 9.56 GV) and Moscow (2.42 GV), It was looked at how these characteristics affected the cycle's ascending, maximum, and declining phases. It is demonstrated that the majority of the modulation potential variations during this cycle can be reproduced using a combination of these factors. An extensive analysis of the time profiles, correlations, and time lags of the cosmic-ray intensity versus these parameters across the entire studied period of 1996–2022, reveals the cycle's distinctive characteristics as being strange. Also, the acquired hysteresis curves and correlative analysis intervals of the cycle provide noticeably distinct behaviour between solar and heliospheric parameter behaviour.

Keywords: Cosmic Ray Intensity; Geomagnetic Activity; Solar Activity.
DOI: https://doi.org/10.22323/1.444.1310
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