Catalogue of 55-80 MeV solar proton events extending through solar cycles 23 and 24
Autor: | Paassilta Miikka, Raukunen Osku, Vainio Rami, Valtonen Eino, Papaioannou Athanasios, Siipola Robert, Riihonen Esa, Dierckxsens Mark, Crosby Norma, Malandraki Olga, Heber Bernd, Klein Karl-Ludwig |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: | |
Zdroj: | Journal of Space Weather and Space Climate, Vol 7, p A14 (2017) |
Popis: | We present a new catalogue of solar energetic particle events near the Earth, covering solar cycle 23 and the majority of solar cycle 24 (1996-2016), based on the 55-80 MeV proton intensity data gathered by the SOHO/ERNE experiment. In addition to ERNE proton and heavy ion observations, data from the ACE/EPAM (near-relativistic electrons), SOHO/EPHIN (relativistic electrons), SOHO/LASCO (coronal mass ejections, CMEs), and GOES soft X-ray experiments are also considered and the associations between the particle and CME/X-ray events deduced to obtain a better understanding of each event. A total of 176 SEP events have been identified as having occurred during the time period of interest; their onset and solar release times have been estimated using both velocity dispersion analysis (VDA) and time-shifting analysis (TSA) for protons, as well as TSA for near-relativistic electrons. Additionally, a brief statistical analysis has been performed on the VDA and TSA results, as well as the X-rays and CMEs associated with the proton/electron events, both to test the viability of the VDA and to investigate possible differences between the two solar cycles. We find, in confirmation of a number of previous studies, that VDA results for protons that yield an apparent path length of 1 AU < s Comment: 33 pages, 12 figures (2 with multiple image files), 1 appendix as an external PDF file. Article is in the accepted manuscript/referee (single column) format |
Databáze: | OpenAIRE |
Externí odkaz: |