J. Space Weather Space Clim.
Volume 10, 2020
|Number of page(s)||16|
|Published online||22 January 2020|
Prediction of Solar Proton Event Fluence spectra from their Peak flux spectra
Space Applications & Research Consultancy – SPARC, Aiolou St. 73, 10551 Athens, Greece
2 European Research and Technology Centre, European Space Agency, 2201 AZ Noordwijk, The Netherlands
3 Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing (IAASARS), National Observatory of Athens, I. Metaxa & Vas. Pavlou St., 15236 Penteli, Greece
4 Departament de Física Quàntica i Astrofísica, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona, 08007 Barcelona, Spain
5 Department of Physics and Astronomy, University of Turku, 20500 Turku, Finland
6 Belgian Institute for Space Aeronomy, BIRA-IASB, Division of Space Physics, 1180 Brussels, Belgium
Accepted: 17 December 2019
Solar Proton Events (SPEs) are of great importance and significance for the study of Space Weather and Heliophysics. These populations of protons are accelerated at high energies ranging from a few MeVs to hundreds of MeVs and can pose a significant hazard both to equipment on board spacecrafts as well as astronauts as they are ionizing radiation. The ongoing study of SPEs can help to understand their characteristics, relative underlying physical mechanisms, and help in the design of forecasting and nowcasting systems which provide warnings and predictions. In this work, we present a study on the relationships between the Peak Flux and Fluence spectra of SPEs. This study builds upon existing work and provides further insights into the characteristics and the relationships of SPE Peak flux and Fluence spectra. Moreover it is shown how these relationships can be quantified in a sound manner and exploited in a simple methodology with which the Fluence spectrum of an SPE can be well predicted from its given Peak spectrum across two orders of magnitude of proton energies, from 5 MeV to 200 MeV. Finally it is discussed how the methodology in this work can be easily applied to forecasting and nowcasting systems.
Key words: Solar Proton Events / peak flux / fluence / characteristics / forecasting / nowcasting
© S. Aminalragia-Giamini et al., Published by EDP Sciences 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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