Results 61 to 70 of about 77,336 (163)

Daily Peak Activity of the African Lightning Chimney Based on Meteosat Third Generation (MTG) Lightning Imager (LI), World Wide Lightning Location Network (WWLLN), and Schumann Resonance (SR) Observations

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 20, 28 October 2026.
Abstract Lightning activity is strongly concentrated in tropical continental “chimneys”, among which the African lightning chimney stands out as the most intense globally. However, until recently, the incomplete and spatially uneven detection efficiency of ground‐based lightning networks, together with the limited spatio‐temporal coverage of satellite ...
K. Németh, E. Williams, Q. Wang, A. Neska, G. Sátori, M. Herein, T. Haszpra, P. Steinbach, T. Bozóki   +8 more
wiley   +1 more source

Solar activity variations of nighttime ionospheric peak electron density [PDF]

Journal of Geophysical Research: Space Physics, 2008
Monthly median NmF2 (maximum electron density of the F2‐layer) data at Okinawa, Yamagawa, Kokubunji, and Wakkanai have been collected to investigate the solar activity dependence of the nighttime ionosphere. The result shows that there are seasonal and latitudinal differences of the solar activity variation of nighttime NmF2.
Yiding Chen, Libo Liu, Huijun Le
openaire   +1 more source

A new strategy for ionospheric remote sensing using the 130.4/135.6 nm airglow intensity ratios

Earth and Planetary Physics, 2023
We demonstrate here that global-scale determination of a key ionospheric parameter, the peak height of the F2 region (hmF2), can be obtained by making a simple ratio measurement of the atomic oxygen 130.4 and 135.6 nm emissions in the far-ultraviolet ...
XiaoHan Yin, JianQi Qin, Larry J. Paxton
doaj   +1 more source

Altitude Dependence of Quasi‐Static Potential Drop: The Effect of Ionospheric Protons

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Using an improved kinetic model that incorporates cold ionospheric protons and oxygen ions, we investigate the factors controlling the altitude range of the auroral acceleration region (AAR). In this model, parallel electric fields are generated via Dispersive Alfven Wave‐ Modified electron Acoustic Wave (DAW‐MEAW) coupling and sustained by ...
Run Shi, Jun Liang, Zejun Hu, Desheng Han, Qinghe Zhang   +4 more
wiley   +1 more source

Enhancement of Magnetic Flux Transferred to the Magnetotail Due to a Storm‐Time Kelvin‐Helmholtz Instability

Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.
Abstract Along the flank magnetopause, magnetosheath flow interfaced with the relatively stationary magnetosphere produces strong flow shears, and the Kelvin‐Helmholtz instability (KHI) occurs. When the interplanetary magnetic field (IMF) is southward, anti‐parallel day‐side reconnection and KHI can interact, which may enhance the reconnection rate as ...
Brandon L. Burkholder, Katariina Nykyri, Xuanye Ma, Lauri Holappa, Harsha Gurram, Rachel C. Rice, David Sibeck, Dinesh K. V. Radhakrishnan   +7 more
wiley   +1 more source

Dynamic Evolution of a Storm‐Time “Super‐EPB” Event Over China on the Magnetically Disturbed Night of 01 December 2023

Space Weather, Volume 24, Issue 10, October 2026.
Abstract This paper investigates the dynamic evolution of a storm‐time “Super‐EPB” event over China on 1 December 2023 (Kp ≤ 7, SYM/H ≥ −130 nT) using multi‐instrument observations. Occurring near sunset as the IMF‐Bz abruptly turned southward, with auroral extension to midlatitudes, the “Super‐EPB” extended to 40°N with an apex height of ∼2,460 km ...
Longchang Sun, Jiyao Xu, Wei Yuan, Yajun Zhu, Maosheng He, Wenjie Sun, Guozhu Li, Jiaojiao Zhang, Hong Gao, Aibin Zhang, Weijun Liu, Guojun Wang   +11 more
wiley   +1 more source

Anomalous nighttime electron temperatures over Millstone Hill: a statistical study [PDF]

, 2004
International audienceA statistical study of anomalous nighttime electron temperature enhancements, NETEs, observed on 336 nights during Millstone Hill radar measurements on 730 nights from 1976 to 2001 is carried out.
Lobzin, V. V., V. V. Lobzin, Pavlov, A. V., A. V. Pavlov   +3 more
core   +2 more sources

A mass spectrometric determination of the composition of the nighttime topside ionosphere [PDF]

Journal of Geophysical Research, 1967
The concentrations of H+, He+ and O+ were determined as a function of altitude by means of a magnetic mass spectrometer flown on an Argo D-4 rocket at local midnight on January 17, 1964, from Wallops Island, Virginia. The lower ionosphere consists primarily of O+ with a transition to H+ as the predominant ion at 430 km.
openaire   +1 more source

Ionospheric Response to the 24–27 February 2023 Solar Flare and Geomagnetic Storms Over the European Region Using a Machine Learning–Based Tomographic Technique

Space Weather
Two solar flares accompanied by coronal mass ejections (CMEs) occurred on 24–25 February (DOY 055–056), 2023, resulting in a large magnetic storm on DOY 058.
Ting Li, Dunyong Zheng, Changyong He, Fei Ye, Pengfei Yuan, Yibin Yao, Mengguang Liao, Jian Xie   +7 more
doaj   +1 more source

Numerical Simulation of Ionospheric Disturbance Generated by Ballistic Missile

Advances in Mathematical Physics, 2019
To provide theoretical guidance for the detection of ballistic missiles by skywave over-the-horizon radar, this paper first analyses the best way to detect ballistic missiles based on the rocket detection mechanism.
Jinyuan Zhu, Hanxian Fang, Fan Xia, Tao Wan, Xiaolin Tan   +4 more
doaj   +1 more source