Results 91 to 100 of about 13,189 (224)

Applying Hpo Indices to Empirical Thermospheric Density Models During Geomagnetic Storms

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract Accurate atmospheric drag modeling is essential for precise orbit determination and prediction of Low Earth Orbit satellites. A key component is the thermospheric density, typically estimated using empirical models driven by geomagnetic activity indices such as the 3‐hr Kp or ap.
Kemin Zhu, Jizhang Sang, Xianjie Li, Lei Liu, Yangbo Qian, Shengfu Xia   +5 more
wiley   +1 more source

Inductive Response of Enceladus' Ice Shell and Potentially Stratified Ocean

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract Saturn's moon Enceladus harbors a global subsurface ocean beneath its icy crust. Understanding the structure and composition of this ocean and ice is critical to assessing its potential habitability. Modern electromagnetic (EM) sounding techniques, which measure a celestial body's induced response to external electromagnetic fields, offer a ...
L. Wivell, M. K. Dougherty, A. Masters
wiley   +1 more source

Azimuth estimation based on CNN and LSTM for geomagnetic and inertial sensors data

ICT Express
Although estimating the azimuth using a geomagnetic sensor is very useful, the estimation error may be very large due to the surrounding geomagnetic disturbance.
Jongtaek Oh, Sunghoon Kim
doaj   +1 more source

A Challenging Solar Eruptive Event of 18 November 2003 and the Causes of the 20 November Geomagnetic Superstorm. I. Unusual History of an Eruptive Filament

, 2013
This is the first of four companion papers, which analyze a complex eruptive event of 18 November 2003 in AR 10501 and the causes of the largest Solar Cycle 23 geomagnetic storm on 20 November 2003. Analysis of a complete data set, not considered before,
Chertok, I. M., Filippov, B. P., Grechnev, V. V., Rudenko, G. V., Slemzin, V. A., Temmer, M., Uralov, A. M.   +6 more
core   +1 more source

On the Possibility of Driving the Electron Flux Probabilistic Models by the AE Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract We present the new probabilistic model of the electron fluxes designed to assess the risks of the spacecraft surface charging for missions with near‐equatorial orbits in the inner magnetosphere. It is a second model developed within a frame of the European Space Agency's activity “Plasma Environment Modeling in the Earth's Magnetosphere ...
S. Dubyagin, N. Ganushkina, A. Sicard, J.‐C. Matéo‐Vélez, L. Monnin, D. Heynderickx, P. Jiggens, G. Deprez, F. Cipriani   +8 more
wiley   +1 more source

Thermospheric temperatures during geomagnetically disturbed periods.

Journal of geomagnetism and geoelectricity, 1986
Nighttime thermospheric temperatures were derived from Doppler line profiles of the [OI] 630nm emission that were observed by using a 15-cm high-resolution Fabry-Perot interferometer at a field station near Albany (42.68°N, 73.82°W), New York.The temperatures, obtained during magnetically quiet periods in May, June and July, 1978 when Kp≤2, are ...
S. OKANO, J. S. KIM
openaire   +2 more sources

Magnetic Flux of EUV Arcade and Dimming Regions as a Relevant Parameter for Early Diagnostics of Solar Eruptions - Sources of Non-Recurrent Geomagnetic Storms and Forbush Decreases

, 2012
This study aims at the early diagnostics of geoeffectiveness of coronal mass ejections (CMEs) from quantitative parameters of the accompanying EUV dimming and arcade events.
A. A. Abunin, A. Belov, A. Taktakishvili, A. V. Belov, A.C. Sterling, A.C. Sterling, A.N. Zhukov, A.N. Zhukov, A.V. Belov, B. Schmieder, B. Vršnak, B. Vršnak, B.E. Wood, B.J. Thompson, B.J. Thompson, B.V. Jackson, B.V. Jackson, C.H. Mandrini, C.H. Mandrini, C.H. Miklenic, D. Tripathi, D.F. Webb, D.F. Webb, E.W. Cliver, G. Michalek, G. Siscoe, G. Siscoe, G.E. Brueckner, G.F. Krymskii, H. Song, H. Xie, H.S. Hudson, H.V. Cane, I. M. Chertok, I.G. Richardson, I.G. Richardson, I.G. Richardson, I.M. Chertok, I.M. Chertok, I.M. Chertok, I.M. Chertok, J. Qiu, J. Zhang, J. Zhang, J.-P. Delaboudinière, J.R. Lemen, J.T. Gosling, K. Marubashi, K.-H. Kim, L.K. Harra, M.L. Kaiser, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Gopalswamy, N. Lugaz, P. Dèmoulin, P.H. Scherrer, P.K. Manoharan, R.-S. Kim, S. Kahler, S. Yashiro, S.-M. Kang, S.E. Gibson, V. Bothmer, V. V. Grechnev, V. Yurchyshyn, V. Yurchyshyn, V. Yurchyshyn, Y. Liu, Y. Liu, Y. Liu, Y. Zhang, Y.M. Wang, Z. Švestka, Z.K. Smith   +76 more
core   +1 more source

Assessing Magnetic Fluctuations Effects in the South American Sector in Relation to Global Variations Using Ksa Index, Kp Index, and Hybrid Formats During Quiet Times Across the Seasons of the 2020 Solar Minimum

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract Geomagnetic indices can be used to quantify variations in geomagnetic activity caused by Sun‐Earth interactions across the magnetosphere and ionosphere. The global Kp index is widely used as a global geomagnetic indicator, but it is based mostly on the Northern Hemisphere with no contributions from South American observatories.
L. M. Guizelli, C. M. Denardini, J. Moro, L. C. A. Resende, S. S. Chen, P. K. Nyassor   +5 more
wiley   +1 more source

The Time Delays in Reaction of the Ionosphere and the Earth’s Magnetic Field to the Solar Flares on 8 May and Geomagnetic Superstorm on 10 May 2024

Atmosphere
In the paper we consider the pulsed disturbances caused in the ionosphere by an extreme G5-level geomagnetic superstorm on 10 May 2024, and by the X1.0 and M-class solar flares on 8 May 2024, which preceded the storm.
Nazyf Salikhov, Alexander Shepetov, Galina Pak, Serik Nurakynov, Vladimir Ryabov, Zhumabek Zhantayev, Valery Zhukov   +6 more
doaj   +1 more source

The Great Space Weather Event during February 1872 Recorded in East Asia

, 2018
The study of historical great geomagnetic storms is crucial for assessing the possible risks to the technological infrastructure of a modern society, caused by extreme space-weather events.
Ebihara, Yusuke, Giunta, Alessandra S., Hattori, Kentaro, Hayakawa, Hisashi, Hayakawa, Satoshi, Macdonald, Lee T., Mitsuma, Yasuyuki, Shibata, Kazunari, Silverman, Sam M., Toriumi, Shin, Wild, Matthew N., Willis, David M.   +11 more
core   +1 more source