Results 51 to 60 of about 1,542 (192)

Height‐Dependent Evolution of the Ionospheric Response to the May 2024 Superstorm: Global GNSS‐POD, GNSS‐RO, and Ground‐Based Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Capturing global ionospheric response during extreme geomagnetic storms remains a major observational challenge. During 10–11 May, 2024 superstorm, we investigate the height‐dependent response of the F‐region using multi‐constellation GNSS‐POD limb‐sounding measurements from COSMIC‐2, Spire, PlanetiQ, and FengYun‐3 satellites. Approximately 12,
Nimalan Swarnalingam, Dong L. Wu, Daniel J. Emmons, Cornelius Csar Jude H. Salinas   +3 more
wiley   +1 more source

Distorted Magnetic Flux Ropes within Interplanetary Coronal Mass Ejections

The Astrophysical Journal
Magnetic flux ropes (MFRs) at the center of interplanetary coronal mass ejections (ICMEs) are often characterized as simplistic cylindrical or toroidal tubes with field lines that twist around the cylinder or torus axis.
Andreas J. Weiss, Teresa Nieves-Chinchilla, Christian Möstl   +2 more
doaj   +1 more source

Predicting Nitrogen Isotope Fractionation in Nitrate Deposition on Early Mars

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Noachian and early Hesperian Mars were likely warm and wet, with an atmosphere abundant in molecular nitrogen. The recent discovery of nitrate deposits in the Yellowknife Bay mudstones at Gale Crater confirm the existence of nitrogen oxides (NOX) on Noachian Mars. The processes responsible for the production of these nitrates would fractionate
J. Shawcross, D. J. Adams, M. L. Wong, K. J. Smith, Y. L. Yung   +4 more
wiley   +1 more source

Probing Velocity Dispersion Inside Coronal Mass Ejections: New Insights on Their Initiation

The Astrophysical Journal Letters
This work studies the kinematics of the leading edge and the core of six coronal mass ejections (CMEs) in the combined field of view of Sun Watcher using Active Pixel System detector and Image Processing (SWAP) on board PRoject for On-Board Autonomy ...
Satabdwa Majumdar, Elke D’Huys, Marilena Mierla, Nitin Vashishtha, Dana-Camelia Talpeanu, Dipankar Banerjee, Martin A. Reiss   +6 more
doaj   +1 more source

Comparing Solar Structure Detection Methods in SDO/AIA Observations and the Application to Raw Uncalibrated Data

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract Recent advances in solar physics increasingly rely on automated identification of coronal structures using machine learning. Yet most studies emphasize scientific performance without evaluating feasibility for onboard deployment to prioritize downlink observations.
P. Gonidakis, F. Carella, E. Dineva, H‐J. Jeong, P. Antunes, A. Podobas, S. Raptis, V. Toy‐Edens, M. Jin, S. Poedts, J. Magdalenic, G. Miloshevich   +11 more
wiley   +1 more source

Different triggering mechanisms for solar flares and coronal mass ejections [PDF]

Astronomy & Astrophysics, 2008
Context. Experimental observations indicate that flares and CMEs are often associated, even if the precise relationship between the two phenomena is a still hot and open question. Aims. We present a study of the statistical properties of solar flare and CME temporal organisation, in order to enlighten differences in the mechanisms at the basis of their
LIPPIELLO, Eugenio, DE ARCANGELIS, Lucilla, GODANO, Cataldo   +2 more
openaire   +1 more source

Machine Learning for Local Detection of Separators in Three‐Dimensional Magnetic Fields

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract Magnetic reconnection is a major plasma phenomenon occurring in various key environments ranging from the Sun and near‐Earth space to astrophysical plasmas. While magnetic reconnection is relatively well‐understood under two‐dimensional (2D) settings, it remains challenging to characterize in three‐dimensional (3D) magnetic fields.
Fanni Franssila, Markku Alho, Ioanna Bouri, Daniel Holmberg, Minna Palmroth, Teemu Roos   +5 more
wiley   +1 more source

Automated Detection of Coronal Mass Ejections with Few-shot Learning

The Astrophysical Journal Supplement Series
Coronal mass ejections (CMEs) are a primary driver of severe space weather impacts, yet accurate delineation of CME structure in coronagraph images remains challenging.
Xin Liu, Jiajia Liu, Shuhua Song, Ye Jiang, Xin Huang, Zhanpeng Xu, Robertus Erdélyi, Yimin Wang   +7 more
doaj   +1 more source

On the Detection of Low‐Frequency Planetary Radio Emission With an Orbiting Interferometer

Radio Science, Volume 61, Issue 6, June 2026.
Abstract The magnetized planets of the outer Solar System produce kilometric radio emissions at very low frequencies (<1 ${< } 1\,$MHz). They reveal the planetary magnetic dynamics and their interaction with the solar wind. Those radio emissions can also serve as a proxy for interplanetary space weather monitoring.
E. Rouillé, B. Cecconi, B. Segret, J. N. Girard, A. Loh   +4 more
wiley   +1 more source

Understanding the Evolution of the Three-part Structure of a Coronal Mass Ejection Using Multiviewpoint Observations

The Astrophysical Journal
The three-part structure (bright front, dark cavity, and bright core) of coronal mass ejections (CMEs) in white-light (WL) coronagraphic images has been studied for decades.
Bin Zhuang, Noé Lugaz, Manuela Temmer, Tingyu Gou, Carlos R. Braga, Joan Burkepile   +5 more
doaj   +1 more source