Results 61 to 70 of about 274,087 (189)

Effects of solar eclipse on the electrodynamical processes of the equatorial ionosphere: a case study during 11 August 1999 dusk time total solar eclipse over India [PDF]

Annales Geophysicae, 2002
The effects on the electrodynamics of the equatorial E- and F-regions of the ionosphere, due to the occurrence of the solar eclipse during sunset hours on 11 August 1999, were investigated in a unique observational campaign involving ground based
R. Sridharan, R. Sridharan, R. Sridharan, C. V. Devasia, N. Jyoti, D. Tiwari, K. S. Viswanathan, K. S. V. Subbarao   +7 more
doaj   +1 more source

Characterization of local time dependence of equatorial spread F responses to substorms in the American sector

Journal of Space Weather and Space Climate, 2023
Substorms have been found to play an important role in ionospheric electrodynamics at low and equatorial latitudes. In this study, we have investigated the possible influence of substorm on the generation of equatorial spread F (ESF).
Gao Shunzu, Cai Hongtao, Zhan Weijia, Wan Xin, Xiong Chao, Zhang Hong, Xu Chen   +6 more
doaj   +1 more source

Nighttime Westward Equatorial Electrojet Observed During the January 2026 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The equatorial electrojet (EEJ) is a narrow band of zonal electric current flowing in the E‐region ionosphere within approximately ±2° $\pm 2{}^{\circ}$ latitude of the magnetic equator. At night, the EEJ is generally considered very weak because of low ionospheric conductivity.
Y. Yamazaki, M. V. da Silva, J. Matzka, G. B. Soares, A. Grayver, D. R. Themens, S. K. Das, C. Stolle, A. Maute, S. Perwitasari, M. Nishioka, R. Kaewthongrach, S. Channumsin, Y. Setiawan, M. Syirojudin, X. Yue, A. Yoshikawa, S. Abe, K. Girgis, R. Flores, F. Justo, J. Inostroza, G. Vichare, G. Seemala, A. Nel, N. M. Giday, A. Samy   +26 more
wiley   +1 more source

Research-based course materials and assessments for upper-division electrodynamics (E&M II) [PDF]

, 2013
Favorable outcomes from ongoing research at the University of Colorado Boulder on student learning in junior-level electrostatics (E&M I) have led us to extend this work to upper-division electrodynamics (E&M II).
Steven J. Pollock, Charles Baily, Baily, Charles, Pollock, Steven J., Michael Dubson, Dubson, Michael, Baily, Charles; id_orcid   +6 more
core   +1 more source

How Does the Magnetosphere‐Ionosphere Current System Respond to Solar Flares?

Geophysical Research Letters
While the isolated effects of solar flares on low‐latitude ionospheric electrodynamics have been well documented, the coupled system response of the equatorial electrojet (EEJ), auroral electrojet (AEJ), field‐aligned currents (FACs), and asymmetric ring
Hongkai Tang, Jing Liu, Xuanqing Liu, Xiangyu Niu, Jiawei Zhang, Shuhan Li   +5 more
doaj   +1 more source

Vertical E × B drift velocity variations and associated low-latitude ionospheric irregularities investigated with the TOPEX and GPS satellite data [PDF]

Annales Geophysicae, 2003
With a well-selected data set, the various events of the vertical E × B drift velocity variations at magnetic-equator-latitudes, the resultant ionospheric features at low-and mid-latitudes, and the practical consequences of these E × B events on ...
I. Horvath, E. A. Essex
doaj   +1 more source

Physics‐Based Ensemble of Models for F2 Peak Parameters of the Ionosphere: Comparison With COSMIC‐2 Measurements

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Space weather events can significantly alter the ionospheric electron density, affecting signal transmission and navigation accuracy in satellite‐based systems. Consequently, there is an urgent need for reliable forecasting of the Thermosphere‐Ionosphere (TI) system.
J. Pereira, I. Fernandez‐Gomez, F. Heymann, F. Günzkofer, C. Borries, M. Schmidt   +5 more
wiley   +1 more source

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

Geophysical Research Letters
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 ...
T. Ijuin, H. Jin, A. Yoshikawa
doaj   +1 more source

Rocket and radar investigation of background electrodynamics and bottom-type scattering layers at the onset of equatorial spread F [PDF]

Annales Geophysicae, 2006
Sounding rocket experiments were conducted during the NASA EQUIS II campaign on Kwajalein Atoll designed to elucidate the electrodynamics and layer structure of the postsunset equatorial F region ionosphere prior to the onset of equatorial spread F ...
D. L. Hysell, M. F. Larsen, C. M. Swenson, A. Barjatya, T. F. Wheeler, T. W. Bullett, M. F. Sarango, R. F. Woodman, J. L. Chau, D. Sponseller   +9 more
doaj   +1 more source

Neutral Wind Control of Jupiter's Non‐Auroral Ionosphere

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract We use JAMMIES (JAMMIES is Another Model Making Ionospheric EStimates), a new model of Jupiter's non‐auroral ionosphere, to demonstrate that neutral wind‐driven field‐aligned plasma transport can explain decades of measurements inconsistent with a solar‐dominated ionosphere. Two observations highlight these inconsistencies: a minimum in H3+ ${\
K. Mohamed, O. Agiwal, L. Moore, I. Mueller‐Wodarg, J. D. Huba, C. Martinis, T. Stallard, H. Melin   +7 more
wiley   +1 more source