2 papers
astro-ph.SR2026
Shock properties for solar energetic particle events with signatures of inverse velocity arrival
A. Kouloumvakos, D. Lario, G. M. Mason +20
We present a detailed investigation of the shock properties associated with solar energetic particle (SEP) events that exhibit a concave (``nose-like'') shape in their energy spect…
astro-ph.SR2025
How the CME on 21 April 2023 Triggered the First Severe Geomagnetic Storm of Solar Cycle 25
Evangelos Paouris, Angelos Vourlidas, Manolis K. Georgoulis +2
The first severe (G4) geomagnetic storm of Solar Cycle 25 occurred on 23-24 April 2023, following the arrival of a Coronal Mass Ejection (CME) on 23 April. The characteristics of t…