Results 61 to 70 of about 1,041 (168)

Solar flare effects on the geomagnetic elements during normal and counter electrojet periods [PDF]

Earth, Planets and Space, 2014
The paper describes the study of solar flare effects (sfe) on horizontal (H), eastward (Y) and vertical (Z) components of the geomagnetic field at the Indo-USSR chain of magnetic observatories extending from the magnetic latitudes 0° to 45°N, a network not available any where else in the world.
Rastogi, R. G., Pathan, B. M., Rao, D. R. K., Sastry, T. S., Sastri, J. H.   +4 more
openaire   +1 more source

Variations in Ionospheric Parameters Associated With the 20–21 May 2012 Annular and 21 August 2017 Total Solar Eclipses

The Scientific World Journal, Volume 2026, Issue 1, 2026.
This study investigates the ionospheric effects of the annular solar eclipse (20–21 May 2012) and total solar eclipse (21 August 2017) across midlatitude stations, analyzing critical parameters: F2‐layer critical frequency (foF2), peak height (hmF2), and total electron content (TEC).
Manghang Limbu, Samyam Pudasaini, Sujan Prasad Gautam, Binod Adhikari, Ashok Silwal, Iva Kumari Lamichhane, Rohit Bhattarai, Pitri Bhakta Adhikari, K.-W.-A. Chee   +8 more
wiley   +1 more source

Upwelling Metallic Ions Producing Valley Region Irregularities Over Low Latitude During the 2025 New Year Magnetic Storm

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Valley region irregularities (VRIs) have been previously investigated using radar, ionosonde, and rocket‐borne in situ observations. In this paper, based on a joint observational experiment by lidar and radars performed in Hainan, China, we report a case of low‐latitude VRIs generated in association with uplifted metallic ions for the first ...
Jing Jiao, Wenjie Sun, Guozhu Li, Yajun Zhu, Biqiang Zhao, Guotao Yang, Tatsuhiro Yokoyama, Septi Perwitasari, Lianhuan Hu, Jianfei Liu, Haiyong Xie, Zhaoguo Huang, Xiaofei Wu, Chunxiao Yan   +13 more
wiley   +1 more source

Observations of the Earth's magnetic field from the Space Station: Measurement at high and extremely low altitude using Space Station-controlled free-flyers [PDF]

Simulation studies established that the main (core), crustal and electrojet components of the Earth's magnetic field can be observed with greater resolution or over a longer time-base than is presently possible by using the capabilities provided by the ...
Frawley, J. J., Stefanik, M., Webster, W., Jr.   +2 more
core   +1 more source

Indices of equatorial electrojet and counter-electrojet in the Indian region: Evolution of the indices and their authenticity

Journal of Earth System Science, 1983
Indices of the equatorial electrojet and counter-electrojet in the Indian region have been evolved based on certain reasonable assumptions, by a criterion depending on the difference in the horizontal field strength between a station under the electrojet axis (Trivandrum) and a station outside the jet influence (Alibag).
B N Bhargava, B R Arora, N S Sastri
openaire   +2 more sources

Rapid Reversal of Hemispheric Asymmetry in the Intensity of EIA Crests During the Geomagnetic Storm of 23 April 2023: A Unique Observation From GOLD

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract This study, using the peak electron density of Ionospheric F‐region from the Global‐scale Observations of the Limb and Disk reports, for the first time, a unique phenomenon: the rapid reversal of the intensity of the Equatorial Ionization Anomaly (EIA) crests between the hemispheres during the main phase of 23 April 2023, geomagnetic storm ...
K. Shimna, R. K. Archana, C. Vineeth, Gang Lu, T. K. Pant, M. S. M. Vijayan   +5 more
wiley   +1 more source

Self‐Regulating Feedback Between Field Line Curvature Scattering, Ring Current Pressure, and Magnetic Configuration

Geophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract We incorporate field line curvature (FLC) scattering into a kinetic ring current model two‐way coupled with a global magnetospheric MHD model to investigate its role in SYM‐H prediction and global magnetospheric dynamics. FLC scattering reduces plasma pressure in regions where the ion gyroradius is comparable to the local FLC radius.
Suk‐Bin Kang, Alex Glocer, Mei‐Ching Fok, Cristian P. Ferradas, Natalia Buzulukova, Gonzalo Cucho‐Padin   +5 more
wiley   +1 more source

A Personal Voyage Among Earth and Space Physics Disciplines

Perspectives of Earth and Space Scientists, Volume 6, Issue 1, December 2025.
Abstract I have organized my thoughts in an autobiographical way in relation to the several distinct phases of my career encompassing Earth and space physics. I discuss atmospheric and space physics topics of interest to me in an international context, and I emphasize the value of community activities and international conferences for the interchange ...
Michael J. Rycroft
wiley   +1 more source

トウナン アジア チイキ ニオケル セキドウ ジェット デンリュウ ノ タイヨウ カツドウ イゾンセイ [PDF]

, 2013
赤道ジェット電流(equatorial electrojet: EEJ)は,昼側磁気赤道直下における電離層電気伝導度の局所的増強に起因する電流系である.我々は,波長10.7 cmの太陽電波強度(F10.7)を太陽活動度の指標として用いて,EEJ強度の太陽活動度依存性を調査した.本研究で我々は,MAGDAS/CPMN 観測網のデータを用いて新しく構築されたEEJ指数の一つの成分であるEUEL指数のうち,2011 年の東南アジア地域のデータから算出されたEUEL 指数を解析に用いた.磁気赤道から±3 ...
Huixin Liu, Huixin Liu, Kiyohumi Yumoto, Nurul Shazana Abdul Hamid, Nurul Shazana Abdul Hamid, Teiji Uozumi, 湯元 清文, 魚住 禎司   +7 more
core   +1 more source

The longitudinal variability of equatorial electrojet and vertical drift velocity in the African and American sectors [PDF]

, 2014
While the formation of equatorial electrojet (EEJ) and its temporal variation is believed to be fairly well understood, the longitudinal variability at all local times is still unknown.
A. Mebrahtu, B. Damtie, B. Rabiu, C. F. Valladares, C. M. Biouele, E. Yizengaw, E. Zesta, M. B. Moldwin, R. Stoneback   +8 more
core   +1 more source