Results 81 to 90 of about 60,099 (238)

Astudy and Analysis of Geomagnetic Field By using Model of International Geomagnetic Reference Field (IGRF- 2000)

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2017
The IGRF model is the empirical representation of the Earth magnetic field recommended for scientific use by the International Association of Geomagnetism and Aeronomy(IAGA).
H. A A I- Mahdi
doaj  

Mesospheric and Lower Thermospheric Responses to the May 2024 Geomagnetic Storm in the Antarctic Peninsula

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract We analyze the response of mean winds and semidiurnal tides (SDTs) in the mesosphere and lower thermosphere (MLT; ∼70–110 km altitude) to the May 2024 geomagnetic super storm, based on meteor radar (MR) observations from King Sejong Station (KSS; geographic: 62.22°S, 58.78°W; geomagnetic: 53.27°S, 10.88°E) in the Antarctic Peninsula.
Byeong‐Gwon Song, In‐Sun Song, Masaru Kogure, Geonhwa Jee, Jeong‐Han Kim, Changsup Lee, Eunsol Kim, Young‐Bae Ham, Hosik Kam   +8 more
wiley   +1 more source

Improved model for solar cosmic ray exposure in manned Earth orbital flights [PDF]

A calculational model is derived for use in estimating Solar cosmic ray exposure to critical body organs in low-Earth orbit at the center of a large spherical shield of fixed thickness.
Atwell, William, Cucinotta, Francis A., Nealy, John E., Shinn, Judy L., Townsend, Lawrence W., Wilson, John W.   +5 more
core   +1 more source

Estimating the extremes in European geomagnetic activity [PDF]

, 2009
Rapidly changing geomagnetic field variations constitute a natural hazard, for example in navigation and, through geomagnetically induced currents, to power grids and pipeline networks.
Dawson, Ewan, Reay, Sarah, Thomson, Alan
core  

Evolution of Open Magnetic Flux During Substorms: The Effects of Dipole Tilt Angle

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract There is a long‐standing debate on the causes of the semiannual variation of geomagnetic activity. One of the prevailing hypotheses is that the Earth's dipole tilt angle Ψ ${\Psi }$ modulates the dayside reconnection rate, causing the so‐called equinoctial effect. Here we perform the first large‐scale statistical study to test this hypothesis.
A. Nair, L. Holappa, H. Vanhamäki, S. E. Milan   +3 more
wiley   +1 more source

Statistical relationships between variations of the geomagnetic field, auroral electrojet, and geomagnetically induced currents

Solar-Terrestrial Physics, 2019
Using observations from the IMAGE magnetic observatories and the station for recording geomagnetically induced currents (GIC) in the electric transmission line in 2015, we examine relationships between geomagnetic field and GIC variations.
Vorobev A.V., Pilipenko V.A., Sakharov Ya.A., Selivanov V.N.   +3 more
doaj   +1 more source

Rapid Evolution of Super Equatorial Plasma Bubbles and X‐Pattern EIA Formation During Extreme Storm Conditions on 12 November 2025

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract Extreme conditions during storms profoundly alter the evolution of equatorial plasma bubbles (EPBs), yet the key dynamics remains poorly understood. We document the rapid expansion, contraction, and decay of super EPBs in South America during the 12 November 2025 storm with Interplanetary Magnetic Field (IMF) Bz/By magnitude exceeding ∼50 nT ...
Shasha Zou, Lei Liu, Hang Liu, Anthea Coster, Robert Kerr, Jonas Souza, Angela Santos   +6 more
wiley   +1 more source

Robustness of characteristics of the Matuyama-Brunhes geomagnetic field reversal found in global models

Frontiers in Earth Science
Paleomagnetic data enables the global reconstruction of the geomagnetic field, allowing the investigation of significant events like polarity reversals and excursions.
Ahmed Nasser Mahgoub, Ahmed Nasser Mahgoub, Monika Korte, Sanja Panovska, Maximilian Schanner   +4 more
doaj   +1 more source

Thousand‐Kilometer‐Scale Wavelike Undulations in Ionospheric Plasma Bubble Lifetime and Development Over Wide Longitudes

Geophysical Research Letters, Volume 53, Issue 6, 28 March 2026.
Abstract The irregularities of ionospheric plasma bubbles (EPBs) sequentially generated over wide longitudes are expected to share similar lifetime under normal conditions. In this study, we report a special case where the EPB irregularity lifetime over wide longitudes showed a quasi‐wavelike undulation pattern with wavelength of ∼3,000 km, that is ...
Wenjie Sun, Yuichi Otsuka, Guozhu Li, Prayitno Abadi, Zequan Wang, Guofeng Dai, Lianhuan Hu, Biqiang Zhao, Jianfei Liu, Haiyong Xie, Xiukuan Zhao, Yi Li, Baiqi Ning, Atsuki Shinbori, Michi Nishioka, Septi Perwitasari   +15 more
wiley   +1 more source

Ground-based absolute magnetic survey on the backbone network of points of the secular passage in Ukraine for the era of 2005

Геофизический журнал, 2010
The results of the geomagnetic field components on renewed Ukrainian repeat stations (RS) network are considered. The methods of absolute geomagnetic and astro-geodetic measurements are described, as well as methods of geomagnetic field reduction to ...
V. Yu. Maksimchuk, M. I. Orlyuk, V. I. Tregubenko, Yu. M. Gorodiski, V. P. Myasoedov, E.F. Nakalov   +5 more
doaj   +1 more source