Results 51 to 60 of about 4,172 (194)

Neutral Wind Dynamics in High‐Latitude Regions During the 17 March 2013 Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Neutral winds play a critical role in transporting mass, momentum, and energy throughout the upper atmosphere. During geomagnetic storms, momentum is transferred to the thermosphere primarily through ion–neutral collisions, along with other forces. This study investigates high‐latitude neutral wind dynamics during the 17 March 2013 storm using
A. Alhothali, A. J. Ridley, M. Akhavan‐Tafti   +2 more
wiley   +1 more source

Probing Coronal Mass Ejection Inclination Effects with EUHFORIA

The Astrophysical Journal
Coronal mass ejections (CMEs) are complex magnetized plasma structures in which the magnetic field spirals around a central axis, forming what is known as a flux rope (FR).
Karmen Martinić, Eleanna Asvestari, Mateja Dumbović, Tobias Rindlisbacher, Manuela Temmer, Bojan Vršnak   +5 more
doaj   +1 more source

Forecasting Continuum Intensity for Solar Active Region Emergence Prediction Using Transformers

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract Early and accurate prediction of solar active region (AR) emergence is crucial for space weather forecasting. Building on established Long Short‐Term Memory (LSTM) based approaches for forecasting the continuum intensity decrease associated with AR emergence, this work expands the modeling with new architectures and targets.
Jonas Tirona, Sarang Patil, Spiridon Kasapis, Eren Dogan, John Stefan, Irina N. Kitiashvili, Alexander G. Kosovichev, Mengjia Xu   +7 more
wiley   +1 more source

Coronal mass ejection precursors in Sun-like stars: Flux rope modelling and coronal signatures

Astronomy & Astrophysics
Context. Coronal mass ejections (CMEs) are among the most energetic manifestations of solar and stellar activity. In the Sun, they play a central role in space weather, while in more active stars, the solar paradigm indicates that they should be even ...
Cécere M., Costa A., Amazo-Gómez E. M., Alvarado-Gómez J. D.   +3 more
doaj   +1 more source

Assessment of Spacecraft Internal Charging in the Earth's Outer Radiation Belt

Space Weather, Volume 24, Issue 8, August 2026.
Abstract The internal charging effects triggered by energetic (>100 keV) electrons in the Earth's radiation belts can cause anomalies and failures of electronic components aboard spacecraft. Given the critical importance of safeguarding space assets, it is essential to estimate internal charging risks, which depend highly on the distribution of ...
Yuan Lei, Xing Cao, Binbin Ni, Xueshang Feng, Xiaoyu Wang   +4 more
wiley   +1 more source

Coronal Mass Ejection Image Edge Detection In Heliospheric Imager STEREO SECCHI Data

The Open Journal of Astrophysics, 2022
We present an algorithm to detect the outer edges of Coronal Mass Ejection (CME) events as seen in differences of Heliospheric Imager STEREO SECCHI HI-1 images from either A or B spacecraft, as well as its implementation in Python.
Marc Nichitiu
doaj   +1 more source

Expansion Speed of Coronal Mass Ejections

Solar Physics, 2009
A large set of limb coronal mass ejections (CMEs) are used to determine the accurate relationship between radial (V rad) and expansion (V exp) speeds of CMEs. It is demonstrated that this relation is exceptionally well described by the function f(w)=1/2(1+cot w), representing a full cone model for the CME
Michałek, Grzegorz, Gopalswamy, N., Yashiro, S.   +2 more
openaire   +2 more sources

Coronal Mass Ejections: Observations [PDF]

Living Reviews in Solar Physics, 2012
Solar eruptive phenomena embrace a variety of eruptions, including flares, solar energetic particles, and radio bursts. Since the vast majority of these are associated with the eruption, development, and evolution of coronal mass ejections (CMEs), we focus on CME observations in this review. CMEs are a key aspect of coronal and interplanetary dynamics.
David F. Webb, Timothy A. Howard
openaire   +2 more sources

Forecast and Nowcast Solar Energetic Particles (SEP) Radiation Doses in Near Earth/Moon Space

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Solar energetic particle (SEP) events pose a critical radiation hazard to human space exploration, and extreme SEPs must be mitigated operationally to avoid serious health impacts. Accurate prediction of SEP‐induced radiation exposure is essential to ensure mission safety.
Jiajun Liu, Jingnan Guo, Mikhail I. Dobynde   +2 more
wiley   +1 more source

Validating DIRECD: Statistical Evaluation of Coronal Mass Ejection Direction Estimates from Coronal Dimmings

The Astrophysical Journal Supplement Series
Coronal mass ejections (CMEs) are among the most energetic phenomena in our solar system, with significant implications for space weather. Understanding their early dynamics remains challenging due to observational limitations in the low corona.
Shantanu Jain, Tatiana Podladchikova, Karin Dissauer, Astrid M. Veronig, Amaia Razquin   +4 more
doaj   +1 more source