Results 81 to 90 of about 447,486 (188)

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

The Poleward Shift of the Equatorial Ionization Anomaly During the Main Phase of the Superstorm on 10 May 2024

Remote Sensing
On 10 May 2024, a super geomagnetic storm with a minimum Dst index of less than −400 nT occurred. It has attracted a significant amount of attention in the literature.
Di Bai, Yijun Fu, Chunyong Yang, Kedeng Zhang, Yongqiang Cui   +4 more
doaj   +1 more source

Characteristics of Longitudinal Discontinuity Over Nighttime Equatorial Ionization Anomaly Crests With Multiple Observations [PDF]

Longitudinal discontinuity is observed over nighttime equatorial ionization anomaly (EIA) crests, characterized by a significant depletion between longitudes. Multiple observations, especially GOLD 135.6-nm airglow images, are used to investigate the EIA
Tang, Zijing, Zhong, Jiahao, Cai, Lei, Kuai, Jiawei, Cai, Lujin, Wan, Xin, Li, Qiaoling, Song, Xingyan, Hao, Yongqiang, Cai, Xuguang, Han, Hao, Chen, Jiawen   +11 more
core   +1 more source

Effect of equatorial ionization anomaly on the occurrence of spread-F

, 2014
. The unique geometry of the geomagnetic field lines over the equatorial ionosphere coupled with the E– W electric field causes the equatorial ionization anomaly (EIA) and equatorial spread-F (ESF).
V. V. Somayajulu, P. V. S. Rama Rao, P. T. Jayach, P. Sri Ram   +3 more
core  

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

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

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

Four‐Peak Structure on Equatorial Ionization Anomaly Crests During the May 2024 Geomagnetic Storms [PDF]

This study investigates the four-peak electron density structure in the Equatorial Ionization Anomaly (EIA) during the intense geomagnetic storms of 10–20 May 2024, utilizing dayside data at ∼500 km from the China Seismo-Electromagnetic Satellite (CSES ...
Giulia D’Angelo, Zeren Zhima, Zihang Wang, Chao Xiong, Weixing Pu, Roberto Battiston, Piersanti Mirko, Yanyan Yang, Rui Yan, Yuyang Huang, He Huang, Shun-Rong Zhang, Xiaoying Sun   +12 more
core   +1 more source

Site 1216

, 2002
Site 1216 (21°27.16´N, 139°28.79´W; 5152 meters below sea level [mbsl]; Fig. F1) is situated in abyssal hill topography south of the Molokai Fracture Zone and two small associated unnamed parasitic fracture zones (Fig. F2).
Lyle, M., Vanden Berg, M.D., Quintin, L., Wilson, P.A., Backman, J., Pälike, H., Coxall, H.K., Janecek, T.R., Raffi, I., Moore, T.C., Nomura, R., Nigrini, C.A., Faul, K., Tripati, A.K., Parés, J.M., Rea, B.R., Kruse, S., Wade, B.S., Nishi, H., Lanci, L., Hovan, S.A., Lear, C.H., Gaillot, P.A., Knoop, P., Busch, W.H., Norris, R.D., Rea, D.K., Steiger, T.H.   +27 more
core   +1 more source

Effect of impact ionization in scaled pHEMTs [PDF]

, 2000
The effect of impact ionization on pseudomorphic high electron mobility transistors is studied using Monte Carlo simulations when these devices are scaled into deep decanano dimensions.
Kalna, K., Elgaid, K., Asenov, A., Thayne, I.   +3 more
core   +2 more sources