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Solar energetic particles are mainly protons and originate from the Sun during solar flares or coronal shock waves. Forecasting the Solar Energetic Protons (SEP) flux is critical for several operational sectors, such as communication and…

Solar and Stellar Astrophysics · Physics 2023-10-19 Mohamed Nedal , Kamen Kozarev , Nestor Arsenov , Peijin Zhang

Space weather, driven by solar flares and Coronal Mass Ejections (CMEs), poses significant risks to technological systems. Accurately forecasting these events and their impact on Earth's magnetosphere remains a challenge because of the…

Solar and Stellar Astrophysics · Physics 2025-01-27 Sabrina Guastavino , Edoardo Legnaro , Anna Maria Massone , Michele Piana

We present our results on the correlation of non-interacting coronal mass ejections (CMEs) and solar energetic particles (SEPs). A statistical analysis was conducted on 25 SEP events and the associated CME and flare during the ascending…

Solar and Stellar Astrophysics · Physics 2020-10-06 Anitha Ravishankar , Grzegorz Michalek

The application of machine learning to the study of coronal mass ejections (CMEs) and their impacts on Earth has seen significant growth recently. Understanding and forecasting CME geoeffectiveness is crucial for protecting infrastructure…

Most simulations of coronal mass ejections (CMEs) to date either focus on the interplanetary propagation of a giant plasma "blob" without paying too much attention to its origin and to the formation process or they focus on the complex…

Solar and Stellar Astrophysics · Physics 2014-11-20 N. Lugaz , I. I. Roussev , I. V. Sokolov , C. Jacobs

We investigate the solar phenomena associated with the origin of the solar energetic particle (SEP) event observed on 2013 April 11 by a number of spacecraft distributed in the inner heliosphere over a broad range of heliolongitudes. We use…

Solar and Stellar Astrophysics · Physics 2015-06-23 D. Lario , N. E. Raouafi , R. -Y. Kwon , J. Zhang , R. Gomez-Herrero , N. Dresing , P. Riley

Coronal Mass Ejections (CMEs) are immense eruptions of plasma and magnetic fields that are propelled outward from the Sun, sometimes with velocities greater than 2000 km/s. They are responsible for some of the most severe space weather at…

Solar and Stellar Astrophysics · Physics 2023-11-08 Jon Linker , Tibor Torok , Cooper Downs , Ronald Caplan , Viacheslav Titov , Andres Reyes , Roberto Lionello , Pete Riley

We perform and analyze results of a global magnetohydrodyanmic (MHD) simulation of the fast coronal mass ejection (CME) that occurred on 2011 March 7. The simulation is made using the newly developed Alfv\'en Wave Solar Model (AWSoM), which…

Solar and Stellar Astrophysics · Physics 2017-01-18 M. Jin , W. B. Manchester , B. van der Holst , I. Sokolov , G. Toth , A. Vourlidas , C. A. de Koning , T. I. Gombosi

The launches of Parker Solar Probe (Parker) and Solar Orbiter (SolO) are enabling a new era of solar wind studies that track the solar wind from its origin at the photosphere, through the corona, to multiple vantage points in the inner…

By coupling the EUropean Heliospheric FORcasting Information Asset (EUHFORIA) and the improved Particle Acceleration and Transport in the Heliosphere (iPATH) model, two energetic storm particle (ESP) events, originating from the same active…

Forecasting models of the solar wind often rely on simple parameterizations of the magnetic field that ignore the effects of the full magnetic field geometry. In this paper, we present the results of two solar wind prediction models that…

Solar and Stellar Astrophysics · Physics 2015-06-19 Lauren N. Woolsey , Steven R. Cranmer

We present an advance towards accurately predicting the arrivals of coronal mass ejections (CMEs) at the terrestrial planets, including Earth. For the first time, we are able to assess a CME prediction model using data over 2/3 of a solar…

We study the solar energetic particle (SEP) event associated with the 2012 July 23 extreme solar storm, for which STEREO and the spacecraft at L1 provide multi-point remote sensing and in situ observations. The extreme solar storm, with a…

Solar and Stellar Astrophysics · Physics 2016-08-31 Bei Zhu , Ying D. Liu , Janet G. Luhmann , Huidong Hu , Rui Wang , Zhongwei Yang

Inspired by the concept of relativity of simultaneity used in the theory of special relativity, a new approach is proposed to simulate future solar wind conditions at any point in the inner solar system. An important distinctive feature of…

Solar and Stellar Astrophysics · Physics 2025-01-22 Igor V. Sokolov , Tamas I. Gombosi

The NASA STEREO mission opened up the possibility to forecast the arrival times, speeds and directions of solar transients from outside the Sun-Earth line. In particular, we are interested in predicting potentially geo-effective…

Solar and Stellar Astrophysics · Physics 2015-06-04 Christian Möstl , Jackie A. Davies

This study quantifies how uncertainty in physically meaningful coronal mass ejection (CME) and solar-wind inputs propagates into forecast-relevant diagnostics from eruption to 1 AU. We use a semi-analytic erupting flux rope (EFR) model to…

Solar and Stellar Astrophysics · Physics 2026-05-07 S. Stamkos , S. Patsourakos , A. Vourlidas , E. Paouris

In this work, a gradual solar energetic particle (SEP) event observed by multispacecraft has been simulated. The time profiles of SEP fluxes accelerated by an interplanetary shock in the three-dimensional interplanetary space are obtained…

Solar and Stellar Astrophysics · Physics 2015-09-09 G. Qin , Y. Wang

Predicting the large-scale eruptions from the solar corona and their propagation through interplanetary space remains an outstanding challenge in solar- and helio-physics research. In this article, we describe three dimensional…

Solar and Stellar Astrophysics · Physics 2020-09-08 Ravindra T. Desai , Han Zhang , Emma E. Davies , Julia E. Stawarz , Joan Mico-Gomez , Pilar Iváñez-Ballesteros

The Stratospheric Observatory for Infrared Astronomy (SOFIA) has recently concluded a set of engineering flights for Observatory performance evaluation. These in-flight opportunities are viewed as a first comprehensive assessment of the…

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
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