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Structure of the Power Spectral Density of Galactic Cosmic Ray Variation during 1953-2016

  • Pauli Väisänen (a1), Ilya Usoskin (a1) and Kalevi Mursula (a1)
Abstract

Fluxes of galactic cosmic rays (GCR) observed at 1 AU are modulated inside the heliosphere at different time scales. Here we study the properties of the power spectral density (PSD) of galactic cosmic ray variability using hourly data from 31 neutron monitors (NM) from 1953 to 2016. We pay particular attention to the reliability of the used datasets and methods. We present the overall PSD and discuss different parts of the spectrum and the related periodicities. We find significant spectral peaks at the periods of 11 years, 1.75 years, 155 days, 27 days and 24 hours and the harmonics of the latter two peaks. We calculate a power law slope of −1.79 ± 0.13 for the period range between 50 and 130 hours and a slope of −1.34 ± 0.17 for the period range between 40 days and 3.4 years (1000 − 30000 h).

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Gil, A. & Mursula, K. 2017, A&A, 599, A112
Moraal, H., Belov, A. & Clem, J. M. 2000, Space Sci. Revs, 93, 285303
Munteanu, C., Negrea, C., Echim, M. & Mursula, K. 2016, AG, 34, 437
Mursula, K., Zieger, B. & Vilppola, J. H. 2003, Solar Phys., 7, 123
Kudela, K., Ananth, A. G. & Venkatesan, D. 1991, J. Geophys. Res.: Space Physics, 96, 2156
Simpson, J. A. 2000, Space Sci. Revs, 93, 1132
Usoskin, I. G., Alanko-Huotari, K., Kovaltsov, G. A. & Mursula, K., 2005 J. Geophys. Res., 110, A12108
Valdés-Galicia, J. F., Pérez-Enríquez, R. & Otaola, J. A. 1996, Solar Phys., 167, 409
Zaqarashvili, T. V., Carbonell, M., Oliver, R. & Ballester, J. L. 2010, ApJ, 709, 749
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Proceedings of the International Astronomical Union
  • ISSN: 1743-9213
  • EISSN: 1743-9221
  • URL: /core/journals/proceedings-of-the-international-astronomical-union
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