Results 191 to 200 of about 91,577 (233)

Dynamical Complexity in Geomagnetically Induced Current Activity Indices Using Block Entropy. [PDF]

Entropy (Basel)
Boutsi AZ, Papadimitriou C, Balasis G, Brinou C, Zampa E, Giannakis O.   +5 more
europepmc   +1 more source

Assimilation of Ground and Satellite Magnetic Observations Unravels the Ionospheric, Magnetospheric, and Induced Fields During the May and October 2024 Geomagnetic Storms

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract The geomagnetic storms of May and October 2024 were the strongest storms of solar cycle 25, with the Dst $Dst$ index as low as −412 nT and auroras down to low latitudes. To investigate these extreme events, we developed a global magnetic field model of magnetospheric, ionospheric, and Earth‐induced contributions obtained by assimilating ...
Alexander Grayver, Jingtao Min, Nils Olsen, Ashley Smith   +3 more
wiley   +1 more source

Grey wolf optimizer with self-repulsion strategy for feature selection. [PDF]

Sci Rep
Wang Y, Yin Y, Zhao H, Liu J, Xu C, Dong W.   +5 more
europepmc   +1 more source

The Importance of Pickup H+ Escape at Mars

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract The loss of hydrogen ions on Mars to space largely occurs through the interaction of solar wind with planetary atmosphere. However, the relative importance of different ion escape channels is not yet fully understood. In addition, there are still open questions about the proportion of H+ ${\mathrm{H}}^{+}$ escape in relation to total hydrogen ...
Qi Xu, Lianghai Xie, Lei Li, Yiteng Zhang, Limin Wang, Fuhao Qiao, Yongyong Feng, Linggao Kong   +7 more
wiley   +1 more source

The Growth and Decay of Intense GNSS Amplitude and Phase Scintillation During Non-Storm Conditions. [PDF]

Space Weather
Madhanakumar M, Spicher A, Vierinen J, Oksavik K, Coster AJ, Huyghebaert DR, Martin CJ, Häggström I, Paxton LJ.   +8 more
europepmc   +1 more source

Detection of Negative Carbon and Oxygen Pickup Ions From Dust Orbiting Jupiter

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract We report on observations of negative carbon and oxygen pickup ions (PUIs) originating from dust orbiting Jupiter. The PUIs are observed at altitudes of a few thousand kilometers (∼4,800–10,200 km) above the 1‐bar level of Jupiter's atmosphere and up to ∼11,000–15,000 km from the equatorial plane, thus providing constraints on the location of ...
F. Allegrini, J. R. Szalay, D. J. McComas, R. W. Ebert, S. J. Bolton, G. Clark, J. E. P. Connerney, W. S. Kurth, P. Louarn, B. Mauk, A. Pontoni, J. Saur, P. Valek, J.‐Z. Wang, R. J. Wilson   +14 more
wiley   +1 more source

Space Surveillance with High-Frequency Radar. [PDF]

Sensors (Basel)
Hennessy B, Yardley H, Debnam R, Camilleri TA, Spencer NK, Holdsworth DA, Warne G, Cheung B, Kharabash S.   +8 more
europepmc   +1 more source

Unique Signatures of Meridional Wind Variations on the Electron Density Distribution Over the Dip Equator

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract We investigate unusual daytime enhancement and undulations observed in Vertical Total Electron Content (VTEC) during the extreme G5 geomagnetic storm on 11 May 2024 over the dip equatorial station Trivandrum, India using a physics‐based ionospheric model.
Arya Ashok, K. M. Ambili, R. K. Choudhary, Gang Lu   +3 more
wiley   +1 more source

Extreme two-phase change of ionospheric electron temperature overshoot during geomagnetic storms. [PDF]

Sci Rep
Smirnov A, Shprits Y, Lühr H, Pignalberi A, Kronberg E, Prol F, Xiong C.   +6 more
europepmc   +1 more source

On Energetic Electron Precipitation in Auroral Arcs

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract A key element of magnetosphere‐ionosphere coupling is the precipitation of electrons, which transfers energy from the collisionless, rarefied magnetospheric plasma into the dense, collisional ionosphere. Two distinct types of such precipitation are: auroral electrons, which carry field‐aligned currents and are responsible for auroral arc ...
Anton Artemyev, Yukitoshi Nishimura, Xiao‐Jia Zhang, Vassilis Angelopoulos   +3 more
wiley   +1 more source