Results 81 to 90 of about 474,530 (188)

Post‐Sunset Merging of Equatorial Ionization Anomaly Crests Into a Single Peak Over ∼35° Longitude During the 19 January 2026 Geomagnetic Superstorm

Geophysical Research Letters
We investigate the nighttime equatorial ionosphere during the 19 January 2026 geomagnetic storm using Global‐scale Observations of the Limb and Disk OI 135.6 nm observations and ground‐based GPS Total Electron Content.
Deepak K. Karan, Richard W. Eastes, Kuldeep Pandey, Wenbin Wang, Carlos R. Martinis, Robert E. Daniell, Quan Gan   +6 more
doaj   +1 more source

A Rare Simultaneous Detection of a Mid‐Latitude Plasma Depleted Structure in O(1D) 630.0 and O(1S) 557.7 nm All‐Sky Airglow Images on a Geomagnetically Quiet Night

Geophysical Research Letters
This letter reports first simultaneous detection of F‐region plasma‐depleted structure in O(1D) 630.0 and O(1S) 557.7 nm airglow images on a geomagnetically quiet‐night (Ap = 3) of 26 June 2021 from mid‐latitude station (Hanle, India) due to enhanced ...
D. Patgiri, R. Rathi, V. Yadav, D. Chakrabarty, M. V. Sunil Krishna, S. Kannaujiya, P. Pavan Chaitanya, A. K. Patra, Jann‐Yenq Liu, S. Sarkhel   +9 more
doaj   +1 more source

Variability of the African equatorial ionization anomaly (EIA) crests during the year 2013 [PDF]

, 2018
This paper discusses the variability of the position and magnitude of the crests of African Equatorial Ionization Anomaly during noon and post sunset periods.
Oyeyemi, E.O., P.O. Amaechi, Amaechi, P.O., A.O. Akala, E.O. Oyeyemi, Akala, A.O.   +5 more
core   +1 more source

Climatology of the equatorial thermospheric mass density anomaly [PDF]

, 2007
The equatorial anomaly is an interesting and important feature of the Earth's thermosphere-ionosphere coupling in tropical regions. It is an anomalous latitudinal distribution found in both the ionized and unionized part of the atmosphere.
Lühr, Hermann, Liu, Huixin, Watanabe, Shigeto   +2 more
core   +1 more source

CIR-Driven Geomagnetic Storm and High-Intensity Long-Duration Continuous AE Activity (HILDCAA) Event: Effects on Brazilian Equatorial and Low-Latitude Ionosphere—Observations and Modeling

Atmosphere
This paper investigates the effects of a Corotating Interaction Region (CIR)/High-Speed Stream (HSS)-driven geomagnetic storm from 13 to 23 October 2003, preceding the well-known Halloween storm.
Samuel Abaidoo, Virginia Klausner, Claudia Maria Nicoli Candido, Valdir Gil Pillat, Stella Pires de Moraes Santos Ribeiro Godoy, Fabio Becker-Guedes, Josiely Aparecida do Espírito Santo Toledo, Laura Luiz Trigo   +7 more
doaj   +1 more source

Equatorial anomaly in the Jovian ionosphere

, 1981
The electron concentration data from Pioneer 10 and 11 and Voyager 1 and 2 indicate the presence of equatorial anomaly in the Jovian ionosphere, with the peak electron concentration value showing a minimum near the ...
Mahajan, K. K., K. K. Mahajan
core   +1 more source

Atypical nighttime spread-F structure observed near the southern crest of the ionospheric equatorial ionization anomaly

, 2012
An atypical nighttime spread-F structure is observed on ionograms at or above the F2 trace, near the crest of the ionospheric equatorial ionization anomaly (EIA) region. This ionospheric atypical spread-F phenomenon was observed using two closed spaced(
Bittencourt, J. A., Sobral, J. H. A., Abdu, M. A., Amorim, D. C. M., Moor, L. P., Pimenta, A. A., Muella, M. T. A. H., Sahai, Y., Abalde, J. R., Abreu, A. J., Fagundes, P. R., Pezzopane, M.   +11 more
core   +1 more source

A study on the response of the Equatorial Ionization Anomaly over the East Africa sector during the geomagnetic storm of November 13, 2012

, 2015
Using a set of up to 12 International GNSS Services (IGS) receivers around the East African region, we present the formation of the peak of ionospheric Equatorial Ionization Anomaly during the geomagnetic storm of 13th November 2012.
Mito, Collins, Yamazaki (YY), Yosuke, Cilliers, Pierre, Ngwira, Chigomezyo, Olwendo, Joseph, Baki, Paul   +5 more
core   +3 more sources

Global Variations in GNSS-TEC During Storm Time Substorms on 23 December 2014

Remote Sensing
TEC disturbances have substantial impacts on communications and global positioning systems. Based on total electron content (TEC) observations from global navigation satellite systems and plasma observations from the Defense Meteorological Satellite ...
Yunfang Zhong, Kedeng Zhang, Lin Tang, Yang Yu, Chen Xu   +4 more
doaj   +1 more source

Fraud Equatorial ionization Anomaly

Fraud Equatorial ionization Anomaly
第24回大気圏シンポジウム（2010年2月18日-19日. 宇宙航空研究開発機構宇宙科学研究本部（JAXA)(ISAS)）, 相模原市, 神奈川県 24th Atmospheric Science Symposium (February 18-19, 2010. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan 資料番号: SA6000073020 レポート番号: Ⅳ ...
openaire   +1 more source