Results 31 to 40 of about 5,706 (219)

Observation of ionospheric Alfven resonator with double spectral resonance structures at low latitude station, Shillong ( $$dipole L=1.08$$ d i p o l e L = 1.08 )

Earth, Planets and Space, 2022
Spectral Resonance Structures (SRS) of Ionospheric Alfven Resonator (IAR) are investigated by analysing the magnetic field data of a high sampling frequency induction coil magnetometer, installed at a low latitude Indian station, Shillong $$(25.56^\circ ...
P. Adhitya, Masahito Nosé, Jayashree Bulusu, Geeta Vichare, A. K. Sinha   +4 more
doaj   +1 more source

A 100‐year Geoelectric Hazard Analysis for the U.S. High‐Voltage Power Grid

Space Weather, 2020
A once‐per‐century geoelectric hazard map is created for the U.S. high‐voltage power grid. A statistical extrapolation from 31 years of magnetic field measurements is made by identifying 84 geomagnetic storms with the Kp and Dst indices.
G. M. Lucas, J. J. Love, A. Kelbert, P. A. Bedrosian, E. J. Rigler   +4 more
doaj   +1 more source

Fluid‐Induced Magnetic Enhancement in Sandstone Friction Experiments: Implications for Coseismic Fault Temperature Estimates

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Constraining peak temperature during seismic slip is essential for quantifying earthquake energy budgets and fault weakening. Rock magnetic methods provide a sensitive means of estimating shear‐induced coseismic temperature rise; however, the role of fluids in friction‐induced magnetic alterations remains poorly constrained.
Qiang Fu, Mark J. Dekkers, Simo Spassov, Derya Gürer, Chien‐Cheng Hung, Job P. B. Arts, André R. Niemeijer   +6 more
wiley   +1 more source

A comparison of ground-based hydroxyl airglow temperatures with SABER/TIMED measurements over 23° N, India [PDF]

Annales Geophysicae, 2017
Ground-based observations of OH (6, 2) Meinel band nightglow were carried out at Ranchi (23.3° N, 85.3° E), India, during January–March 2011, December 2011–May 2012 and December 2012–March 2013 using an all-sky imaging system.
N. Parihar, D. Singh, S. Gurubaran
doaj   +1 more source

Paleomagnetic Evidence of Internal Rotation in the Eastern Qiangtang and Its Relation to Distributed Strike‐Slip Faulting in the Southeastern Tibetan Plateau

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The southeastern Tibetan Plateau has undergone complex deformation due to the India‐Eurasia collision. Although late‐stage internal rotations are documented in the Lanping‐Simao Terrane to the south, it remains unclear whether similar processes have affected the north.
Wanlong Xu, Maodu Yan, Mathew Domeier, Chong Guan, Qiang Fu, Liang Yu, Zhichao Niu, Miaomiao Shen, Bingshuai Li, Dawen Zhang, Zunbo Xu, Yuwei Zhang   +11 more
wiley   +1 more source

Late Carboniferous Paleomagnetism From North Qiangtang Block Reveals a Multibranched Paleo‐Tethys Ocean

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The North Qiangtang Block occupies a pivotal position within the eastern Tethyan realm, and its paleogeographic reconstruction is critical for constraining Tethyan geometry and evolution. However, its Late Paleozoic paleogeography and Paleo‐Tethyan Ocean–continent configuration remain controversial due to limited reliable age‐constrained ...
Jiahui Zhang, Xin Cheng, Zhongshan Shen, Daniel Pastor‐Galán, Bitian Wei, Longyun Xing, Dongmeng Zhang, Nan Jiang, Mengting Zhong, Shuqi Lan, Muhammad Rizwan, Chenglong Deng, Hanning Wu   +12 more
wiley   +1 more source

Kinetic Alfvén Waves Excited by Multiple Free Energy Sources in the Magnetotail

The Astrophysical Journal, 2023
The generation of kinetic Alfvén waves (KAWs) is investigated through a three-component theoretical model incorporating ion beam and velocity shear as the sources of free energy in a non-Maxwellian κ -distributed plasmas.
K. C. Barik, S. V. Singh, G. S. Lakhina
doaj   +1 more source

On the Foundational Arguments of Sufficient Dimension Reduction

WIREs Computational Statistics, Volume 18, Issue 2, June 2026.
Contemporary Sufficient Dimension Reduction, a versatile method for extracting material information from data, can serve as a preprocessor for classical modeling and inference, or as a standalone theory that leads directly to statistical inference. ABSTRACT Sufficient dimension reduction (SDR) refers to supervised methods of dimension reduction that ...
R. Dennis Cook
wiley   +1 more source

Simultaneous OI 630 nm imaging observations of thermospheric gravity waves and associated revival of fossil depletions around midnight near the equatorial ionization anomaly (EIA) crest [PDF]

Annales Geophysicae
We report F-region airglow imaging of fossil plasma depletions around midnight that revived afresh under persisting thermospheric gravity wave (GW) activity. An all-sky imager recorded these events in OI 630 nm imaging over Ranchi (23.3° N, 85.3° E; mlat.
N. Parihar, S. Padincharapad, S. Padincharapad, A. K. Singh, P. Mahavarkar, A. P. Dimri   +5 more
doaj   +1 more source

The United States Magnetotelluric Array and the National Impedance Map

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract The United States Magnetotelluric Array (USMTArray) data set, collected in the years 2006–2024, consists of more than 1,700 long‐period magnetotelluric stations covering the entirety of the contiguous United States on a quasi‐regular 70 km grid.
Anna Kelbert, Paul A. Bedrosian, Adam Schultz, Gary D. Egbert, Louise Pellerin, Jeffrey J. Love, Andrew Frassetto, Benjamin S. Murphy   +7 more
wiley   +1 more source