Climatology of quiet time geomagnetic field variations at two locations in Antarctica

G Vichare, A Kulkarni, R Rawat, GK Seemala… - Polar Science, 2023 - Elsevier
During geomagnetic quiet conditions, Indian Antarctic stations are considered to be located
outside the auroral oval: Maitri (CGM coordinates: 63.3° S, 54.2° E) is equatorward and …

Non‐migrating thermospheric tides shift and deform the solar quiet current vortex over Asia

P Zhang, YY Sun, CH Chen… - Journal of Geophysical …, 2024 - Wiley Online Library
Variations in the Solar quiet (Sq) current are typically attributed to the changes in
atmospheric tides. In this study, we analyzed the ground‐based observations of the …

Re‐visiting EEJ and CEJ occurrences pattern under the influence of Sq variations of both hemispheres

RK Archana, M Lingala, K Arora - Journal of Geophysical …, 2023 - Wiley Online Library
The present study investigated the variability in Equatorial electrojet (EEJ) and Counter
electrojet (CEJ) extracted at the Indian equatorial station Tirunelveli (TIR) using low‐latitude …

Equinoctial asymmetry in solar quiet fields along the 120° E meridian chain

Y Wu, L Liu, Z Ren - Applied Sciences, 2021 - mdpi.com
Equinoctial asymmetry of the range of the solar quiet day variation (Sq) of the horizontal
geomagnetic field (H) has been found in some low latitude geomagnetic observatories. This …

On the occurrence of afternoon counter electrojet over Indian longitudes during June solstice in solar minimum

K Pandey, R Sekar, BG Anandarao… - Journal of …, 2018 - Wiley Online Library
Studies made earlier using ground‐based observations of geomagnetic field over the Indian
longitudes revealed that the occurrence of equatorial counter electrojet (CEJ) events in …

Optimal site selection for the geomagnetic measurements at Hanle Observatory in Ladakh, India: Insights from magnetic campaign survey

GK Seemala, G Vichare, AP Dimri - Journal of Earth System Science, 2024 - Springer
The Himalayas are a region of geomagnetic importance, as they impact the geomagnetic
field of Earth and space weather, as it is one of the largest mountain belts in the world. Due …

Quasi‐biennial oscillation of the ionospheric wind dynamo

Y Yamazaki, H Liu, YY Sun, Y Miyoshi… - Journal of …, 2017 - Wiley Online Library
The interannual variation of the ionospheric solar quiet (Sq) current system is examined. A
dense magnetometer network over Japan enables the accurate determination of the central …

Two‐Step Method for Determining the Solar Quiet Current Focus and the Validation Using Observing Procedure Experiment

P Zhang, YY Sun, CH Chen, Z Mao - Earth and Space Science, 2023 - Wiley Online Library
It was known that the Solar quiet (Sq) current is important for the ionosphere dynamics,
which can cause variations in the geomagnetic fields recorded on the ground. Using a north …

Semiannual variation of Pc5 ultra-low frequency (ULF) waves and relativistic electrons over two solar cycles of observations: comparison with predictions of the …

FL Poblet, F Azpilicueta, HL Lam - Annales Geophysicae, 2020 - angeo.copernicus.org
Pc5 ULF (ultra-low frequency) waves can energize electrons to relativistic energies of> 2
MeV in geostationary orbits. Enhanced fluxes of such electrons can induce operational …

Relationship between ionospheric TEC and geomagnetic SqZ at middle and low latitudes

C Niu, Y Wei, B Xu, X Li, X Mu - Frontiers in Astronomy and Space …, 2022 - frontiersin.org
Solar quiet variation (Sq) generated from ionospheric currents are among the most important
type of geomagnetic variations. In this paper, the correlation between the geomagnetic Z …