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Solar and Stellar Coronal Mass Ejections - a review of the Cool Stars 21 splinter session

, 2023
Coronal mass ejections (CMEs) are the most energetic phenomena related to magnetic activity and, by impacting the interplanetary space, they can be the source of severe planetary disturbances. Solar CMEs and their sources, such as flares and filament/prominence eruptions, have been intensively observed and studied over decades.
Chifu, Iulia, Santos, Ângela R. G., Gafeira, Ricardo, Bothmer, Volker   +3 more
openaire   +1 more source

Observing Solar Coronal Mass Ejections from Space [PDF]

In this contribution to the panel discussion of the IAU Symposium 388 Solar and Stellar Coronal Mass Ejections , I concentrate on white-light observations of solar coronal mass ejections (CMEs) from space and specifically address the following aspects ...
Lamy, Philippe
core   +3 more sources

Editorial to the Special Issue “Propagation of Coronal Mass Ejections”

, 2023
Coronal mass ejections (CMEs) and their associated shocks are one of the main drivers of heliosphere variability, causing both interplanetary and planetary perturbations [...
Fang Shen, Mateja Dumbović
core   +1 more source

Pumping Venom: Valvilli Architecture in Diacamma (Hymenoptera: Formicidae) and Implications for Stinger Functionality

Journal of Morphology, Volume 287, Issue 9, September 2026.
The insect stinger is among the best‐known venom‐delivery structures, yet its valvilli—paired flaps within the valve chamber—remain poorly understood. Using micro‐CT, histology, serial block‐face SEM and CLSM in the ant Diacamma nr. indicum, we show that the valvilli are not uniformly flexible flaps but are materially differentiated structures with ...
Alexandre Casadei‐Ferreira, Johan Billen, Sebastian Büsse, Julian Katzke, Riou Mizuno, Adrian Richter, Evan Economo   +6 more
wiley   +1 more source

On the Effects of the Solar Wind Structure in the Global Distribution of dBH/dt ${\text{dB}}_{H}/\text{dt}$ Spikes During Geomagnetic Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract Variations in the solar wind, particularly those associated with interplanetary coronal mass ejections (ICMEs) and high‐speed streams (HSSs), drive geomagnetic disturbances that produce rapid changes in the ground magnetic field. These variations, commonly quantified by the time derivative of the horizontal magnetic field dBH/dt $\left({\text ...
José P. Marchezi, Amy Keesee, Michael Coughlan, Raman Mukundan, Victor Pinto, Ligia A. Da Silva, Livia R. Alves, Hyunju Connor, Don Hampton   +8 more
wiley   +1 more source

Magnetospheric preconditioning under northward IMF: evidence from the study of coronal mass ejection and corotating interaction region geoeffectiveness [PDF]

, 2006
Motivated by recent observations and simulations of the formation of a cold and dense plasma sheet in the tail of the magnetosphere under northward interplanetary magnetic field (IMF) and of the direct influence of the plasma sheet density on the ring ...
Pulkkinen, T. I., Borovsky, Jospeh E., Denton, Michael H., Lavraud, B., Thomsen, M. F.   +4 more
core   +4 more sources

Diagnosis of Coronal Mass Ejections through Local and Global Dimmings

The Astrophysical Journal
Coronal dimmings are localized sharp reductions in soft X-ray and extreme ultraviolet (EUV) emission at the early expansion phase of coronal mass ejections (CMEs). Such local dimmings have global responses, known as Sun-as-a-star or global dimmings. Here,
Tao Ding, Jun Zhang, Ting Li
doaj   +1 more source

Cosmic Ray Anisotropy Generated by the June 22nd 2015 Interplanetary Events

Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.
Abstract On 22 June 2015, the near Earth interplanetary space was perturbed by a series of high‐speed streamers and interplanetary coronal mass ejections associated with an active region and two low‐latitude coronal holes. The interaction of these disturbances gave rise to the complex solar wind structure observed at 1 au.
A. Lara, K. P. Arunbabu, T. Niembro
wiley   +1 more source

Sun-as-a-star Analysis of the Solar Eruption Source Region Using Hα Spectroscopic Observations of CHASE

The Astrophysical Journal
Sun-as-a-star analyses serve as a bridge for comparative studies on solar and stellar activities. To investigate the typical Sun-as-a-star H α temporal spectral characteristics in solar eruption source regions, we analyzed five different types of solar ...
Xiaofeng Liu, Yijun Hou, Ying Li, Ye Qiu, Ting Li, Yingjie Cai, Shihao Rao, Junyi Zhang, Chuan Li   +8 more
doaj   +1 more source

Major Space Weather Risks Identified via Coupled Physics‐Engineering‐Economic Modeling

AGU Advances, Volume 7, Issue 6, September 2026.
Abstract Space weather poses an important but under‐quantified threat to society. While severe geomagnetic storms are recognized as potential global catastrophes, their socio‐economic impacts remain poorly quantified. We present a novel physics‐engineering‐economic framework that links geophysical drivers to power grid geoelectric fields, transformer ...
Edward J. Oughton, Dennies K. Bor, Robert S. Weigel, C. Trevor Gaunt, Ridvan Dogan, Liling Huang, Jeffrey J. Love, Michael Wiltberger   +7 more
wiley   +1 more source