GLE # 67 event on 2 November 2003 : an analysis of the spectral and anisotropy characteristics using verified yield function and detrended neutron monitor data
Mishev, Alexander L.; Koldobskiy, Sergey A.; Kocharov, Leon G.; Usoskin, Ilya G. (2021-05-07)
Mishev, A.L., Koldobskiy, S.A., Kocharov, L.G. et al. GLE # 67 Event on 2 November 2003: An Analysis of the Spectral and Anisotropy Characteristics Using Verified Yield Function and Detrended Neutron Monitor Data. Sol Phys 296, 79 (2021). https://doi.org/10.1007/s11207-021-01832-2
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https://urn.fi/URN:NBN:fi-fe2021051229796
Tiivistelmä
Abstract
During Solar Cycle 23 16 ground-level enhancement events were registered by the global neutron monitor network. In this work we focus on the period with increased solar activity during late October – early November 2003 producing a sequence of three events, specifically on ground-level enhancement GLE 67 on 2 November 2003. On the basis of an analysis of neutron monitor and space-borne data we derived the spectra and pitch-angle distribution of high-energy solar particles with their dynamical evolution throughout the event. According to our analysis, the best fit of the spectral and angular properties of solar particles was obtained by a modified power-law rigidity spectrum and a double Gaussian, respectively. The derived angular distribution is consistent with the observations where an early count rate increase at Oulu neutron monitor with asymptotic viewing direction in the anti-Sun direction was registered. The quality of the fit and model constraints were assessed by a forward modeling. The event integrated particle fluence was derived using two different methods. The derived results are briefly discussed.
Kokoelmat
- Avoin saatavuus [31979]