Results 51 to 60 of about 1,346 (168)

Spatial Variability and Correlation Lengths Within Stream Interaction Regions at 1 au: Comparison Between ACE and Wind

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Understanding the spatial variability and correlation lengths throughout Stream Interaction Regions (SIRs) has importance both for fundamentally understanding the structuring of the solar wind and SIRs and for space weather operations. SIR observations from Advanced Composition Explorer and Wind are utilized to characterize the spatial ...
R. C. Allen, V. Toy‐Edens, S. K. Vines, S. Eriksson, J. M. Raines, S. Lepri, G. Li, Y. Wu, A. Russell, G. C. Ho   +9 more
wiley   +1 more source

Gravity Modeling of Lunar Lava Tubes: Insights From a Terrestrial Analog

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract The exploration of lunar lava tubes can address challenges of human habitation on the Moon by identifying natural shelters against radiation, temperature extremes, and micrometeoroid impacts. This study shows the feasibility of detecting lunar lava tubes with gravimetry using Ape Cave in Washington State, USA, as a terrestrial analog. Ape Cave'
Sarai Montañez Muñoz, Glyn Williams‐Jones, Nathan Hayward, Antonina Calahorrano‐Di Patre, Behraad Bahreyni   +4 more
wiley   +1 more source

Field‐Aligned Currents During High‐Intensity Long‐Duration Continuous Auroral Electrojet Activity Events: A Statistical Study

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Enhanced solar wind‐magnetosphere energy coupling during geomagnetic disturbances leads to strong geomagnetic field‐aligned currents (FACs). While variations of FACs during geomagnetic storms and substorms have been well explored, there is no systematic study of FACs during high‐intensity long‐duration continuous auroral electrojet activities (
Rajkumar Hajra, Bruce T. Tsurutani, Quanming Lu, Aimin Du, San Lu, Xinliang Gao   +5 more
wiley   +1 more source

Field‐Aligned Currents During High‐Intensity Long‐Duration Continuous Auroral Electrojet Activity Events: Seasonal Dependences

Space Weather, Volume 23, Issue 11, November 2025.
Abstract High‐intensity long‐duration continuous auroral electrojet activity (HILDCAA) events caused by interplanetary Alfvén waves are associated with global‐scale convection events. HILDCAAs occur primarily during the solar cycle declining phase (Hajra et al., 2013, https://doi.org/10.1002/jgra.50530). A statistical study is conducted for 42 HILDCAAs
Rajkumar Hajra, Bruce T. Tsurutani, Quanming Lu, Aimin Du   +3 more
wiley   +1 more source

A Note on the Observational Evidence for the Existence of Event Horizons in Astrophysical Black Hole Candidates

The Scientific World Journal, 2013
Black holes have the peculiar and intriguing property of having an event horizon, a one-way membrane causally separating their internal region from the rest of the Universe.
Cosimo Bambi
doaj   +1 more source

Solar Flare Activity, 1937–2024: Introducing the New Hemispheric Solar Flare Index (hSFI) in the Context of 2024's Major Solar Storm Events

Space Weather, Volume 23, Issue 11, November 2025.
Abstract A new daily composite of the solar flare index (SFI) and the hemispherically‐resolved versions (hSFI) are presented for 1937 to 2024. The data set confirms that the northern hemisphere (NH) dominated solar flare activity during Solar Cycles 17 to 21, but that the southern hemisphere has dominated from Solar Cycle 22 to present.
V. M. Velasco Herrera, W. Soon, S. Knoška, A. Özgüç, G. Velasco Herrera, H. Yeşilyaprak, N. Babynets, M. Švanda, J. Muraközy, S. Qiu, D. Riveros‐Rosas, R. Connolly, M. Connolly, A. Tlatov, L. Cappellotto   +14 more
wiley   +1 more source

Electromagnetic Ion Cyclotron Waves in a Magnetic Reconnection Exhaust at Earth's Magnetopause

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract Plasma waves can initiate, regulate, or reflect magnetic reconnection efficiently converting magnetic energy into plasma energy. While waves ranging from below the ion cyclotron frequency to above the electron plasma frequency are commonly observed near reconnection sites, electromagnetic ion cyclotron (EMIC) waves—frequent in other plasma ...
Zewen Chen, Zhenpeng Su, Zhiyong Wu, Lei Dai, Tianran Sun, Binbin Tang, San Lu, Zhaoguo He, Huinan Zheng, Yuming Wang   +9 more
wiley   +1 more source

GWSim: Python package for creating mock GW samples for different astrophysical populations and cosmological models of binary black holes [PDF]

, 2023
Christos Karathanasis, B. Revenu, Suvodip Mukherjee, F. Stachurski   +3 more
openalex   +1 more source

Observation of a Knotted Electron Diffusion Region in Earth's Magnetotail Reconnection

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract Magnetic reconnection is a fundamental plasma process that alters the magnetic field topology and releases magnetic energy. Most numerical simulations and spacecraft observations assume a two‐dimensional diffusion region, with the electron diffusion region (EDR) embedded in the same plane as the ion diffusion region (IDR) and a uniform guide ...
Xinmin Li, Chuanfei Dong, Hantao Ji, Chi Zhang, Liang Wang, Barbara Giles, Hongyang Zhou, Rui Chen, Yi Qi   +8 more
wiley   +1 more source

Comment on "Observational Evidence for Cosmological Coupling of Black Holes and its Implications for an Astrophysical Source of Dark Energy" [PDF]

, 2023
Tobias Mistele
openalex   +2 more sources