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Prediction of the Solar Energetic Particle (SEP) events garner increasing interest as space missions extend beyond Earth's protective magnetosphere. These events, which are, in most cases, products of magnetic reconnection-driven processes…

Solar Energetic Particles (SEPs) are an important aspect of space weather. SEP events posses a high destructive potential, since they may cause disruptions of communication systems on Earth and be fatal to crew members onboard spacecrafts…

Space Physics · Physics 2018-09-05 D. Borovikov , I. V. Sokolov , I. Roussev , A. Taktakishvili , T. I. Gombosi

Ions and electrons accelerated to high energies during flares and coronal mass ejections at the Sun may escape the solar atmosphere and, guided by the interplanetary magnetic fields, propagate through space to near-Earth locations. These…

Solar and Stellar Astrophysics · Physics 2026-04-17 S. Dalla , K. Herbst , R. Muscheler , M. J. Owens

Large solar eruptive events, including solar flares and coronal mass ejections (CMEs), can lead to solar energetic particle (SEP) events. During these events, protons are accelerated up to several GeV and pose numerous space weather risks.…

Solar and Stellar Astrophysics · Physics 2023-03-08 Charlotte Waterfall , Silvia Dalla , Osku Raukunen , Daniel Heynderickx , Piers Jiggens , Rami Vainio

The need for quantitative characterization of the solar energetic particle (SEP) dynamics goes beyond being an academic discipline only. It has numerous practical implications related to human activity in space. The terrestrial magnetic…

Space Physics · Physics 2022-09-21 Valeriy Tenishev , Lulu Zhao , Igor Sokolov

Solar energetic particle (SEP) events are one of the most crucial aspects of space weather. Their prediction depends on various factors including the source solar eruptions such as flares and coronal mass ejections (CMEs). The Geostationary…

Solar and Stellar Astrophysics · Physics 2023-08-16 Sumanth A. Rotti , Petrus C. Martens

Solar Energetic Particles (SEPs) are an important component of Space Weather, including radiation hazard to humans and electronic equipment, and the ionisation of the Earth's atmosphere. We review the key observations of SEPs, our current…

Solar and Stellar Astrophysics · Physics 2017-05-23 Karl-Ludwig Klein , Silvia Dalla

Solar energetic particle (SEP) events are a prime opportunity to probe astrophysical particle acceleration by combining in-situ measurements of particles in space with remote sensing of the hard X-ray (HXR) and \gamma-ray emitting particles…

Solar and Stellar Astrophysics · Physics 2013-04-12 R. Rodríguez-Gasén , J. Kiener , V. Tatischeff , C. Hamadache , K. -L. Klein , N. Vilmer , the SEPServer Consortium

The Sun continuously affects the interplanetary environment through a host of interconnected and dynamic physical processes. Solar flares, Coronal Mass Ejections (CMEs), and Solar Energetic Particles (SEPs) are among the key drivers of…

Solar and Stellar Astrophysics · Physics 2023-09-27 Subhamoy Chatterjee , Maher Dayeh , Andrés Muñoz-Jaramillo , Hazel M. Bain , Kimberly Moreland , Samuel Hart

Solar energetic particles (SEPs) are an important product of solar activity. They are connected to solar active regions and flares, coronal mass ejections (CMEs), EUV waves, shocks, Type II and III radio emissions, and X-ray bursts. These…

Solar energetic particle (SEP) events, as one of the most prominent manifestations of solar activity, can generate severe hazardous radiation when accelerated by solar flares or shock waves formed aside from coronal mass ejections (CMEs).…

Machine Learning · Computer Science 2025-11-13 Anli Ji , Pranjal Patil , Chetraj Pandey , Manolis K. Georgoulis , Berkay Aydin

Solar energetic particle (SEP) events pose severe threats to spacecraft, astronaut safety, and aviation operations. Accurate SEP forecasting remains a critical challenge in space weather research due to their complex origins and highly…

Space Physics · Physics 2026-05-04 Yian Yu , Yang Chen , Lulu Zhao , Kathryn Whitman , Ward Manchester , Tamas Gombosi

In addition to the omnipresent Galactic Cosmic Rays (GCRs), sudden solar energetic particle (SEP) events present considerable health hazards for manned space missions. These events not only contribute to an increased long-term cancer risk,…

Space radiation is a major risk for humans, especially on long-duration missions to outer space, e.g., a manned mission to Mars. Galactic cosmic rays (GCR) contribute a predictable radiation background, the main risk is due to the highly…

Solar Energetic Particles (SEPs) form a critical component of Space Weather. The complex, intertwined dynamics of SEP sources, acceleration, and transport make their forecasting very challenging. Yet, information about SEP arrival and their…

Solar and Stellar Astrophysics · Physics 2024-11-26 Maher A. Dayeh , Subhamoy Chatterjee , Andres Munoz-Jaramillo , Kimberly Moreland , Hazel M. Bain , Samuel Hart

We introduce a new multivariate data set that utilizes multiple spacecraft collecting in-situ and remote sensing heliospheric measurements shown to be linked to physical processes responsible for generating solar energetic particles (SEPs).…

Solar and Stellar Astrophysics · Physics 2023-10-30 Kimberly Moreland , Maher Dayeh , Hazel M. Bain , Subhamoy Chatterjee , Andres Munoz-Jaramillo , Samuel Hart

We present a new empirical model to predict solar energetic particle (SEP) event-integrated and peak intensity spectra between 10 and 130 MeV at 1 AU, based on multi-point spacecraft measurements from the Solar TErrestrial RElations…

Solar and Stellar Astrophysics · Physics 2021-02-24 Alessandro Bruno , Ian G. Richardson

The capability to predict the parameters of an SEP event such as its onset, peak flux, and duration is critical to assessing any potential space weather impact. We present a new flexible modelling system simulating the propagation of Solar…

Solar and Stellar Astrophysics · Physics 2015-06-01 M. S. Marsh , S. Dalla , M. Dierckxsens , T. Laitinen , N. B. Crosby

The injection, propagation and arrival of solar energetic particles (SEPs) during eruptive solar events is an important and current research topic of heliospheric physics. During the largest solar events, particles may have energies up to a…

Solar and Stellar Astrophysics · Physics 2018-05-16 M. Battarbee , J. Guo , S. Dalla , R. Wimmer-Schweingruber , B. Swalwell , D. J. Lawrence

Solar energetic particles (SEPs) can pose hazardous radiation risks to both humans and spacecraft electronics in space. Numerical modeling based on first principles offers valuable insights into the underlying physics of SEPs and provides…

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