Results 51 to 60 of about 237 (168)

Significant Differences in Energetic Storm Particle Properties Observed by STEREO-A and Wind at a Longitudinal Separation of 6°

The Astrophysical Journal
We investigate an energetic storm particle (ESP) event associated with an interplanetary shock observed near 1 au on 2023 November 12 by STEREO-A and Wind, which were longitudinally separated by only ∼6°.
A. Santa Fe Dueñas, N. Lugaz, B. Zhuang, N. Al-Haddad   +3 more
doaj   +1 more source

Interplanetary Tracking of the 23 March 2024 CME: Computer Tomographic Analyses of IPS, White‐Light, and Type II Radio Burst Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract We analyze the propagation of a coronal mass ejection (CME) observed on 23 March 2024, at 01:25 UT by SOHO/LASCO using a multi‐instrument and multi‐method approach. The study combines Interplanetary Scintillation (IPS), type II radio bursts, white‐light, in‐situ observations, and 3D tomographic reconstruction of the inner heliospheric density.
G. Baron, E. Aguilar‐Rodríguez, O. Chang, M. M. Bisi, B. V. Jackson, J. C. Mejía‐Ambriz, R. A. Fallows, Whitham D. Reeve, C. Monstein, Javier Bussons Gordo, Manuel Prieto Mateo   +10 more
wiley   +1 more source

Soft Proton Environment Modeling for SMILE Using XGBoost and Solar Cycle–Informed Synthetic Data Sets

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Soft proton contamination presents a persistent threat to the performance of space‐based X‐ray observatories such as ESA's upcoming Solar‐wind Magnetosphere Ionosphere Link Explorer (SMILE). This study develops a machine‐learning framework for modeling soft proton fluxes in the 92.2–159.7 keV range, tailored to SMILE's elliptical, highly ...
Simon Mischel, Elena A. Kronberg, C. P. Escoubet   +2 more
wiley   +1 more source

A forward‐reverse shock pair in the solar wind driven by over‐expansion of a coronal mass ejection: Ulysses observations

Geophysical Research Letters, 1994
A previously unidentified type of solar wind forward‐reverse shock pair has been observed by Ulysses at 4.64 AU and S32.5°. In contrast to most solar wind forward‐reverse shock pairs, which are driven by the speed difference between fast solar wind plasma and slower plasma ahead, this particular shock pair was driven purely by the over‐expansion of a ...
J. T. Gosling, S. J. Bame, D. J. McComas, J. L. Phillips, E. E. Scime, V. J. Pizzo, B. E. Goldstein, A. Balogh   +7 more
openaire   +1 more source

Shock Properties for Solar Energetic Particle Events with Signatures of Inverse Velocity Arrival

The Astrophysical Journal
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 spectrogram, characterized by inverse velocity arrival (IVA) of the particles ...
A. Kouloumvakos, D. Lario, G. M. Mason, A. Vourlidas, R. C. Allen, N. Wijsen, X. Chen, Z. Ding, I. C. Jebaraj, P. Riley, D. J. McComas, C. M. S. Cohen, E. Paouris, S. Raptis, L. Rodríguez-García, Z. G. Xu, G. D. Berland, G. C. Ho, D. G. Mitchell, E. C. Roelof, J. Rodriguez-Pacheco, M. E. Hill, R. F. Wimmer-Schweingruber   +22 more
doaj   +1 more source

Signatures of interplanetary transients behind shocks and their associated near-surface solar activity [PDF]

Annales Geophysicae, 1998
Interplanetary transients with particular signatures different from the normal solar wind have been observed behind interplanetary shocks and also without shocks.
S. Bravo, X. Blanco-Cano
doaj   +1 more source

New Observations of Cosmic Noise Absorption in the South American Magnetic Anomaly (SAMA) Using a Next‐Generation Riometer

Space Weather, Volume 24, Issue 7, July 2026.
Abstract This study reports the first observations of cosmic noise power (CNP) and cosmic noise absorption (CNA) obtained with a next‐generation riometer installed at the Southern Space Observatory (SSO/INPE) in Brazil, located within the South American Magnetic Anomaly (SAMA).
J. Moro, E. Correia, C. M. Wrasse, J. R. Costa, J. V. Bageston, C. M. Denardini, A. J. Valcorte, L. C. A. Resende, A. M. Santos, L. A. da Silva, J. P. Marchezi, T. S. Trondsen   +11 more
wiley   +1 more source

Contrasting Space Weather Drivers of Two Geomagnetically Induced Current Events in Alberta, Canada During the May 2024 Superstorm

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Strong geomagnetic disturbances (GMDs) caused by intense space storms induce geomagnetically induced currents (GICs) in the Earth and within long conductive infrastructure, potentially posing risks to electricity transmission systems. Here, we investigate the solar wind conditions and magnetospheric processes responsible for two significant ...
Hannah G. Parry, Darcy R. Cordell, Sneha S. Babu, Ryan MacMullin, Ian R. Mann   +4 more
wiley   +1 more source

Shock and SEP Modeling Study for the 2022 September 5 SEP Event

The Astrophysical Journal
On 2022 September 5, during Parker Solar Probe's (PSP) 13th encounter, a fast shock wave and a related solar energetic particle (SEP) event were observed as the spacecraft approached the perihelion of its orbit.
A. Kouloumvakos, N. Wijsen, I. C. Jebaraj, A. Afanasiev, D. Lario, C. M. S. Cohen, P. Riley, D. G. Mitchell, Z. Ding, A. Vourlidas, J. Giacalone, X. Chen, M. E. Hill   +12 more
doaj   +1 more source

Extension, Improvements and Perspectives of the Cluster GRMB Data Set

Journal of Geophysical Research: Space Physics, Volume 131, Issue 7, July 2026.
Abstract The purpose of the Geospace Region and Magnetospheric Boundary identification (GRMB) data set is to provide information on the regions crossed by each of the 4 Cluster spacecraft during the entire mission. The data set includes 15 labels, 11 for regions and transition regions (TR): plasmasphere, plasmapause TR, plasmasheet, plasmasheet TR ...
Benjamin Grison, Fabien Darrouzet, Romain Maggiolo, Mychajlo Hajoš, Michal Dvořák, Matthew Graham George Thaddeus Taylor, Delphine Herment, Arnaud Masson, Jan Souček, Ondřej Santolík, Johan De Keyser   +10 more
wiley   +1 more source