Results 111 to 120 of about 13,690 (192)

Study of the Tidal Variations in the Ionosphere and the MLT Region over Mohe and Beijing During Six Intense Geomagnetic Storms from 2016 to 2021

Remote Sensing
Geomagnetic storms can cause large variations in the ionosphere, but their impacts on the mesosphere and lower thermosphere (MLT) are not well understood. Based on the Total Electron Content (TEC) data and the meteor neutral winds data over Mohe (53.5°N,
Jiarong Ma, Zheng Ma, Jiaxin Bao, Jiahui Luo, Junfeng Yang, Dan Liu   +5 more
doaj   +1 more source

The Non‐Linear Dependence of Daily Maximum Ionospheric Total Electron Content on F10.7

Space Weather, Volume 24, Issue 2, February 2026.
Abstract Daily 10.7 cm solar flux, the F10.7 index, is a key parameter for the ionospheric state. Global maps of ionospheric Total Electron Content (TEC) offer almost continuous multidecadal coverage. We find that the global daily maximum of TEC saturates with daily F10.7.
M. A. Cafolla, S. C. Chapman, N. W. Watkins, O. P. Verkhoglyadova   +3 more
wiley   +1 more source

Origin of Intense Plasma Depletions After Midnight Over the Korean Peninsula During the Geomagnetic Storm on 11 May 2024

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract A band of total electron content (TEC) depletions of about 5–15 TEC unit passed over the Korean Peninsula after midnight during the geomagnetic storm on 11 May 2024. This magnitude of TEC depletions has not been previously reported in the region.
Hyosub Kil, Se‐Heon Jeong, Woo Kyoung Lee, Junseok Hong, Septi Perwitasari, Michi Nishioka, Prayitno Abadi   +6 more
wiley   +1 more source

The causes of recurrent geomagnetic storms [PDF]

The causes of recurrent geomagnetic activity were studied by analyzing interplanetary magnetic field and plasma data from earth-orbiting spacecraft in the interval from November 1973 to February 1974.
Burlaga, L. F., Lepping, R. P.
core   +1 more source

Long-term variations in the geomagnetic activity level Part II: Ascending phases of sunspot cycles

Annales Geophysicae
Monthly averages of the Helsinki Ak-values have been reduced to the equivalent aa-indices to extend the aa-data set back to 1844. A periodicity of about five cycles was found for the correlation coefficient (<i>r</i>) between geomagnetic ...
H. Nevanlinna, M. Storini, O. Borello Filisetti, V. Mussino   +3 more
doaj  

Unusual Forbush Decreases and Geomagnetic Storms on 24 March, 2024 and 11 May, 2024

Atmosphere
As the current solar cycle 25 progresses and moves towards solar maxima, solar activity is increasing and extreme space weather events are taking place.
Helen Mavromichalaki, Maria-Christina Papailiou, Maria Livada, Maria Gerontidou, Pavlos Paschalis, Argyris Stassinakis, Maria Abunina, Nataly Shlyk, Artem Abunin, Anatoly Belov, Victor Yanke, Norma Crosby, Mark Dierckxsens, Line Drube   +13 more
doaj   +1 more source

Ground-based observations of equatorial thermosphere dynamics with a Fabry-Perot interferometer [PDF]

Fabry-Perot determinations of thermospheric temperatures from 630.0 nm nightglow line width measurements were carried out for the period April to August, 1983.
Biondi, M. A., Meriwether, J. W., Jr.
core   +1 more source

Inner Magnetospheric Convection Electric Fields and Corresponding Geomagnetic Indices During High‐Speed Solar Wind Streams

Space Weather
Enhancements of large‐scale convection electric fields in the inner magnetosphere, likely linked to low‐latitude penetration electric fields in the ionosphere, are key components of solar wind–magnetosphere–ionosphere coupling. These fields reflect large‐
Xu Wang, Lei Dai, Tonghui Wang, Yong Ren, Minghui Zhu, Xiaochao Yang, Chi Wang, Walter Gonzalez   +7 more
doaj   +1 more source

Exploring the Potential Observations Between Geomagnetic Activity and Cardiovascular Events: A Scoping Review. [PDF]

Cureus
Belenko J, Cancel G, Mayrovitz HN.
europepmc   +1 more source

The spatiotemporal development of the midlatitude troughs and subauroral ion drift during a geomagnetic storm observed by multiple DMSP satellites. [PDF]

Earth Planets Space
Cha H, Goldstein J, Kataria D, Nishimura Y, Ogasawara K.   +4 more
europepmc   +1 more source