Results 51 to 60 of about 205 (182)

Inner Magnetospheric and Geomagnetic Responses to Solar Wind Driving During Omega Band Events

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Omega bands are mesoscale auroral structures that appear as quasi‐periodic eastward drifting protrusions of the poleward edge of the diffuse aurora. Cribb et al. (2024), https://doi.org/10.1029/2024gl109756 demonstrated that the appearance of omega bands is associated with solar wind driving consistent with stream interaction regions. However,
V. Cribb, T. I. Pulkkinen, L. Kepko, B. Gallardo‐Lacourt, N. Partamies, M. Vokhmyanin, S. Apatenkov   +6 more
wiley   +1 more source

Multispacecraft Observations of 2022 February 8 Prominence Cavity Eruption

The Astrophysical Journal
Helmet streamers are common structures that shape the corona at the largest scales, as observed in eclipse and white-light images. Helmet streamers overlie one cavity embedding a prominence channel and are surrounded by an open field of opposite-polarity
Nishu Karna, Mari Paz Miralles
doaj   +1 more source

Statistical Modeling and Prediction of Ionospheric Equivalent Currents Based on SuperMAG Data

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract We present a Solar Wind driven SuperMAG statistical Equivalent Current model (SW‐SMEC), which represents the ionospheric equivalent currents in the Northern Hemisphere. The model is based on average current patterns derived from SuperMAG ground magnetometer data covering the solar cycle 23 (1997–2008).
J. T. Manninen, H. Vanhamäki, A. T. Aikio, J. Gjerloev   +3 more
wiley   +1 more source

Three-dimensional Density Structure of a Solar Coronal Streamer Observed by SOHO/LASCO and STEREO/COR2 in Quadrature [PDF]

The Astrophysical Journal, 2019
Abstract Helmet streamers are a prominent manifestation of magnetic structures with current sheets in the solar corona. These large-scale structures are regions with high plasma density, overlying active regions and filament channels. We investigate the three-dimensional (3D) structure of a coronal streamer, observed simultaneously by ...
Decraemer, Bieke, Zhukov, Andrei N., Van Doorsselaere, Tom   +2 more
openaire   +3 more sources

Long‐Term Homogeneity of the SSC Series

Space Weather, Volume 23, Issue 10, October 2025.
Abstract Geomagnetic storms produce global variations in the geomagnetic field that are measured at magnetic observatories. Roughly one half of magnetic storms are preceded by sudden increases in the horizontal component of the magnetic field world‐wide.
J. J. Curto, A. Segarra, J. M. Torta, S. Marsal, A. Chambodut, T. Qvick, K. Mursula   +6 more
wiley   +1 more source

Solar Stereoscopy and Tomography

Living Reviews in Solar Physics, 2011
We review stereoscopic and tomographic methods used in the solar corona, including ground-based and space-based measurements, using solar rotation or multiple spacecraft vantage points, in particular from the STEREO mission during 2007--2010 ...
Markus J. Aschwanden
doaj  

Origins of Very Low Helium Abundance Streams Detected in the Solar Wind Plasma

The Astrophysical Journal
The abundance of helium ( A _He ) in the solar wind exhibits variations typically in the range from 2% to 5% with respect to solar cycle activity and solar wind velocity. However, there are instances where the observed A _He is exceptionally low (
Yogesh, N. Gopalswamy, D. Chakrabarty, Parisa Mostafavi, Seiji Yashiro, Nandita Srivastava, Leon Ofman   +6 more
doaj   +1 more source

Modeling the Solar Corona with an Implicit High-order Reconstructed Discontinuous Galerkin Scheme

The Astrophysical Journal Supplement Series, 2023
The present study aims to apply an implicit high-order reconstructed discontinuous Galerkin (DG) scheme (rDG( P _1 P _2 )) to simulate the steady-state solar corona.
XiaoJing Liu, Xueshang Feng, Man Zhang, Jingmin Zhao   +3 more
doaj   +1 more source

Diamagnetic and Expansion Effects on the Observable Properties of the Slow Solar Wind in a Coronal Streamer [PDF]

The Astrophysical Journal, 2005
The plasma density enhancements recently observed by the Large-Angle Spectrometric Coronagraph (LASCO) instrument onboard the Solar and Heliospheric Observatory (SOHO) spacecraft have sparked considerable interest. In our previous theoretical study of the formation and initial motion of these density enhancements it is found that beyond the helmet cusp
A. F. RAPPAZZO, M. VELLI, EINAUDI, GIORGIO, R. B. DAHLBURG   +3 more
openaire   +3 more sources

PSP/IS⊙IS Observation of a Solar Energetic Particle Event Associated with a Streamer Blowout Coronal Mass Ejection during Encounter 6

The Astrophysical Journal, 2022
Abstract In this paper we examine a low-energy solar energetic particle (SEP) event observed by IS⊙IS’s Energetic Particle Instrument-Low (EPI-Lo) inside 0.18 au on 2020 September 30. This small SEP event has a very interesting time profile and ion composition.
T. Getachew, D. J. McComas, C. J. Joyce, E. Palmerio, E. R. Christian, C. M. S. Cohen, M. I. Desai, J. Giacalone, M. E. Hill, W. H. Matthaeus, R. L. McNutt, D. G. Mitchell, J. G. Mitchell, J. S. Rankin, E. C. Roelof, N. A. Schwadron, J. R. Szalay, G. P. Zank, L.-L. Zhao, B. J. Lynch, T. D. Phan, S. D. Bale, P. L. Whittlesey, J. C. Kasper   +23 more
openaire   +3 more sources