Results 61 to 70 of about 7,331 (246)

Variations of Mid‐Magnetotail Magnetic Pressure During Substorms

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Magnetic reconnection is commonly observed in the mid‐tail plasma sheet during substorms, the mechanism behind this spatial preference, however, remains unsolved. This study focuses on magnetic pressure evolution within this critical region during substorms.
Xiaowei Ma, Hui Zhang, Huanzhi Yuan, Runze Li   +3 more
wiley   +1 more source

Rapid Surface Intensification of the Gulf Stream Since 2014

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract The warm, swift Gulf Stream (GS) plays a key role in shaping weather and climate patterns across the North Atlantic. Using 31‐year (1993–2023) of continuous satellite altimeter observations, we identify a pronounced intensification of the free‐flowing GS after its separation from the coast beginning around 2014 and persisting thereafter ...
Shenfu Dong, Marlos Goes, Denis Volkov, Sang‐Ki Lee, Hosmay Lopez   +4 more
wiley   +1 more source

Observations of the Latitude and Frequency Distributions of Equatorward‐Propagating Chorus Waves

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Rising‐tone chorus elements are traditionally known to grow from low frequencies and extend to high frequencies. Using high‐resolution waveform measurements from the Van Allen Probes, we report a novel observation: equatorward‐propagating chorus waves at a few degrees in latitude are observed at high frequencies only.
Qiushuo Wang, Jinxing Li, Jacob Bortnik, Donglai Ma, Jiabei He, Qianli Ma, Ning Kang, Lunjin Chen   +7 more
wiley   +1 more source

Astudy and Analysis of Geomagnetic Field By using Model of International Geomagnetic Reference Field (IGRF- 2000)

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
The IGRF model is the empirical representation of the Earth magnetic field recommended for scientific use by the International Association of Geomagnetism and Aeronomy(IAGA).
H. A A I- Mahdi
doaj  

Modeling of regional magnetic field applying spherical functions: practical aspect

Геофизический журнал, 2019
Modeling of geomagnetic field and creation of geomagnetic maps is one of the main directions of geomagnetic studies. For constructing global model the global spherical Lejeandre functions are used in most cases, though for constructing regional magnetic ...
Yu. P. Sumaruk, L. M. Yankiv-Vitkovska, B. B. Dzuman   +2 more
doaj   +1 more source

Global Cowling Effects in the Sq‐EEJ Current System Under Electrostatic Approximation: Theoretical Simulation

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract The solar quiet (Sq) current and equatorial electrojet are widely known as one of the fundamental currents in ionosphere. Although the Sq‐EEJ current system has been extensively investigated, the manner in which Hall and Pedersen current components collectively organize the system has not been clearly described.
T. Ijuin, H. Jin, A. Yoshikawa
wiley   +1 more source

Comparative Analysis of Ion and Electron Contributions to Ionospheric Ionization at Auroral and Subauroral Latitudes

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Electron and proton precipitation into the nightside ionosphere is a key process in magnetosphere–ionosphere coupling. Although auroral electron precipitation at ∼0.1 ${\sim} 0.1$–10 keV is traditionally considered the main driver of auroral emissions, recent studies show that >30 ${ >} 30$ keV electrons and protons can significantly ...
S. R. Kamaletdinov, A. V. Artemyev, Y. Shen, X.‐J. Zhang, Y. Nishimura, J. Liang, V. Angelopoulos, Y. Miyoshi, K. Keika, K. Asamura, A. Bhatt, S. Kasahara, Y. Kasahara, S. Matsuda, T. Hori, A. Matsuoka, M. Teramoto, K. Yamamoto, S. Yokota, A. Shinbori, F. Tsuchiya, A. Kumamoto, I. Shinohara   +22 more
wiley   +1 more source

Global Plasmaspheric Refilling Rates Inferred From Deep‐Learning Electron Density Reconstructions

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract As a key process in magnetosphere‐ionosphere coupling, plasmaspheric refilling is a long‐standing focus in space physics. In this study, we develop a global electron density (GEO‐NE) model based on a CNN‐Transformer architecture, and use the model to investigate plasmaspheric electron density refilling rates. Using global electron density maps
Zhenyu Guo, Xuzhe Xu, Xiongdong Yu, Zhigang Yuan, Hang Tian, Zuxiang Xue, Dan Deng   +6 more
wiley   +1 more source

Ground-based absolute magnetic survey on the backbone network of points of the secular passage in Ukraine for the era of 2005

Геофизический журнал, 2010
The results of the geomagnetic field components on renewed Ukrainian repeat stations (RS) network are considered. The methods of absolute geomagnetic and astro-geodetic measurements are described, as well as methods of geomagnetic field reduction to ...
V. Yu. Maksimchuk, M. I. Orlyuk, V. I. Tregubenko, Yu. M. Gorodiski, V. P. Myasoedov, E.F. Nakalov   +5 more
doaj   +1 more source

Hydrogen‐Enhanced Grain Boundary Conductivity Explains High‐Conductivity Anomalies in Trans‐Lithospheric Shear Zones

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Magnetotelluric (MT) surveys reveal high electrical conductivity anomalies along major trans‐lithospheric shear zones. Given that trans‐lithospheric shear zones are proposed conduits for deep‐Earth volatiles, we employ molecular dynamics simulations to quantify H+ diffusivity and electrical conductivity at olivine grain boundaries.
Haoqing Wang, Kui Han, Chuanyu Zhang, Xiaofeng Tian, Xuben Wang, Simon Martin Clark   +5 more
wiley   +1 more source