Results 71 to 80 of about 223 (145)

Analysis of the Geomagnetic Storm of May 2024 at Ebre and Livingston Island Observatories and of the GICs Generated in the Spanish Power Transmission Grid

Space Weather, Volume 24, Issue 10, October 2026.
Abstract This study analyzes the 10–12 May 2024 geomagnetic storm using data from the Ebre (Spain) and Livingston Island (Antarctica) geomagnetic observatories, together with modeling approaches to assess its impact on the Spanish power transmission grid.
J. M. Torta, S. Marsal
wiley   +1 more source

Doppler-shifted Signatures in the Chromospheric Line Profiles of II Pegasi

The Astrophysical Journal
Stellar flares are frequently accompanied by prominence eruptions, coronal mass ejections (CMEs), and other forms of plasma motion. Based on the long-term high-resolution spectroscopic monitoring data set of the RS CVn-type star II Pegasi (II Peg), we ...
Dongtao Cao, Shenghong Gu
doaj   +1 more source

Promise and pitfalls of plasma emission as an exo-space-weather tool

Astronomy & Astrophysics
Significant observational effort has been spent on identifying stellar analogues to solar type II and III bursts, which are plasma emission that is produced when coronal mass ejections and fast electron beams, respectively, propagate through the corona ...
Davis Ivey
doaj   +1 more source

Physics‐Based Ensemble of Models for F2 Peak Parameters of the Ionosphere: Comparison With COSMIC‐2 Measurements

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Space weather events can significantly alter the ionospheric electron density, affecting signal transmission and navigation accuracy in satellite‐based systems. Consequently, there is an urgent need for reliable forecasting of the Thermosphere‐Ionosphere (TI) system.
J. Pereira, I. Fernandez‐Gomez, F. Heymann, F. Günzkofer, C. Borries, M. Schmidt   +5 more
wiley   +1 more source

Stellar Magnetic Storm Induced Magnetospheric Polarity Reversals: A Potential Diagnostic for Distinguishing Unmagnetized and Magnetized (Exo)planets

The Astrophysical Journal
(Exo)planetary environments are forced by stellar activity, which manifest through variable radiation, particle and magnetic fluxes, stellar winds, flares, and magnetic storms known as coronal mass ejections (CMEs). Recent studies have shown that planets
Sakshi Gupta, Souvik Roy, Dibyendu Nandy
doaj   +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

Multiwavelength Campaign Observations of a Young Solar-type Star, EK Draconis. I. Discovery of Prominence Eruptions Associated with Superflares

The Astrophysical Journal
Young solar-type stars frequently produce superflares, serving as a unique window into the young Sun-Earth environments. Large solar flares are closely linked to coronal mass ejections (CMEs) associated with filament/prominence eruptions, but ...
Kosuke Namekata, Vladimir S. Airapetian, Pascal Petit, Hiroyuki Maehara, Kai Ikuta, Shun Inoue, Yuta Notsu, Rishi R. Paudel, Zaven Arzoumanian, Antoaneta A. Avramova-Boncheva, Keith Gendreau, Sandra V. Jeffers, Stephen Marsden, Julien Morin, Coralie Neiner, Aline A. Vidotto, Kazunari Shibata   +16 more
doaj   +1 more source

On the Possible Mechanisms of the SEP Event and Electron Enhancement over the SEP Decay Phase on 2023 August 5

The Astrophysical Journal
We carry out this study on the solar energetic particle (SEP) event that occurred on 2023 August 5 over the ascending phase of the current solar cycle 25.
Kazi A. Firoz, Y. P. Li, W. Q. Gan
doaj   +1 more source

Solar Soft X-Ray Coronal Dimming in a Failed Eruption Associated with Plasma Cooling

The Astrophysical Journal Letters
Coronal dimmings are observed as sudden and localized reductions in the extreme-ultraviolet and X-ray emission of the solar corona. Traditionally, significant dimmings of spectral lines formed at temperatures of 1–2 MK are regarded as indicators of ...
Xinyue Wang, Astrid M. Veronig, Hechao Chen, Hui Tian   +3 more
doaj   +1 more source

Investigating Possible Stellar Coronal Mass Ejections in M-type Dwarfs Using the CARMENES Data Release 1 Spectra

The Astrophysical Journal
Stellar coronal mass ejections (CMEs) have significant impacts on surrounding exoplanets and stellar evolution. For M-type dwarf stars, hosting close-in habitable zones, frequent and intense stellar CMEs may render their potentially habitable planets ...
Dongtao Cao, Shenghong Gu
doaj   +1 more source