分类： 天文学 >> 天文学 提交时间： 2023-02-19
Russell D. Marroquin
Viacheslav Sadykov
Alexander Kosovichev
Irina N. Kitiashvili
Vincent Oria
Gelu M. Nita
Egor Illarionov
Patrick M. O'Keefe
Fraila Francis
Chun-Jie Chong
Paul Kosovich
摘要： The flux of energetic particles originating from the Sun fluctuates during the solar cycles. It depends on the number and properties of Active Regions (ARs) present in a single day and associated solar activities, such as solar flares and coronal mass ejections (CMEs). Observational records of the Space Weather Prediction Center (SWPC NOAA) enable the creation of time-indexed databases containing information about ARs and particle flux enhancements, most widely known as Solar Energetic Particle events (SEPs). In this work, we utilize the data available for Solar Cycles 21-24, and the initial phase of Cycle 25 to perform a statistical analysis of the correlation between SEPs and properties of ARs inferred from the McIntosh and Hale classifications. We find that the complexity of the magnetic field, longitudinal location, area, and penumbra type of the largest sunspot of ARs are most correlated with the production of SEPs. It is found that most SEPs ($\approx$60\%, or 108 out of 181 considered events) were generated from an AR classified with the 'k' McIntosh subclass as the second component, and some of these ARs are more likely to produce SEPs if they fall in a Hale class with $\delta$ component. It is confirmed that ARs located in the western hemisphere produced the most SEPs recorded on the Earth's orbit. The resulting database containing information about SEP events and ARs is publicly available and can be used for the development of Machine Learning (ML) models to predict the occurrence of SEPs.
分类： 天文学 >> 天文学 提交时间： 2023-02-19
Aatiya Ali
Viacheslav Sadykov
Alexander Kosovichev
Irina N. Kitiashvili
Vincent Oria
Gelu M. Nita
Egor Illarionov
Patrick M. O'Keefe
Fraila Francis
Chun-Jie Chong
Paul Kosovich
Russell D. Marroquin
摘要： Solar Energetic Particle (SEP) events and their major subclass, Solar Proton Events (SPEs), can result in unfavorable consequences to numerous aspects of life and technology, making them one of the most prevalent and harmful effects of solar activity. Garnering knowledge leading up to such events by studying proton and soft X-ray (SXR) flux data to alleviate the burdens they cause is therefore critical for their forecasting. Our previous SEP prediction study, Sadykov et al. 2021 indicated that it may be sufficient to utilize only proton and SXR parameters for SPE forecasts considering a limited data set from Solar Cycle (SC) 24. In this work we report the completion of a catalog of $\geq$ 10 MeV $\geq$10 particle flux unit (pfu) SPEs observed by Geostationary Operational Environmental Satellite (GOES) detectors operated by the National Oceanic and Atmospheric Administration (NOAA), with records of their properties spanning through SCs 22-24. We report an additional catalog of daily proton and SXR flux statistics. We use these catalogs to test the application of machine learning (ML) for the prediction of SPEs using a Support Vector Machine (SVM) algorithm. We explore how previous SCs can train and test on each other using both earlier and longer data sets during the training phase, evaluating how transferable an algorithm is across different time periods. Validation against the effects of cross-cycle transferability is an understudied area in SEP research, but should be considered for verifying the cross-cycle robustness of an ML-driven forecast.
点击量
待评议
点击量
下载量
评论
