Results 51 to 60 of about 290,411 (293)

Auroral electrojets during geomagnetic storms [PDF]

Journal of Geophysical Research: Space Physics, 1997
On the basis of digital magnetometers from the International monitor auroral geomagnetic effects (IMAGE) and European incoherent scatter (EISCAT) meridional chains in Scandinavia dynamics of the eastward and westward electrojets during the main phase of magnetic storms are considered.
Y. I. Feldstein, A. Grafe, L. I. Gromova, V. A. Popov   +3 more
openaire   +1 more source

Spremembe v gostoti energije magnetnega polja Zemlje na observatoriju PIA, Slovenija, med geomagnetno nevihto G5 11. maja 2024 (= Changes in the energy density of the Earth's magnetic field at the PIA, Slovenia, observatory during the G5 Geomagnetic Storm on May 11, 2024)

Geodetski Vestnik
Geomagnetic storms are the largest disturbance in the Earth's magnetic field. On May 11, 2024, a geomagnetic storm occurred at the peak of the 25th solar cycle, reaching the highest level (G5) on the planetary scale.
Rudi Čop
doaj   +1 more source

A study of geomagnetic storms [PDF]

Geophysical Journal International, 1978
The interplanetary energy flux is estimated on the basis of the Poynting flux and its variations with the rate of energy dissipation in terms of: (1) the ring-current particle injection, (2) Joule dissipation in the ionosphere, and (3) auroral particle injection for 15 major geomagnetic storms.
Paul Perreault, S.-I. Akasofu
openaire   +1 more source

Observational Overview of the May 2024 G5-Level Geomagnetic Storm: From Solar Eruptions to Terrestrial Consequences

Journal of Astronomy & Space Sciences
This study reports comprehensive observations for the G5-level geomagnetic storm that occurred from May 10 to 12, 2024, the most intense event since the 2003 Halloween storm.
Young‐Sil Kwak, Jeongheon Kim, Sujin Kim, Y. Miyashita, Taeyong Yang, Sung-Hong Park, Eun-Kyung Lim, Jongil Jung, H. Kam, Jaewook Lee, Hwanhee Lee, Ji-Hyun Yoo, Haein Lee, R. Kwon, Jung-Jun Seough, Uk-Won Nam, Woo Kyoung Lee, Junseok Hong, J. Sohn, Jaeyoung Kwak, Hannah Kwak, R. Kim, Yeon-Han Kim, Kyung-Suk Cho, Jaeheung Park, Jaejin Lee, H. Nguyen, M. Talha   +27 more
semanticscholar   +1 more source

The GIC and Geomagnetic Response Over Fennoscandia to the 7–8 September 2017 Geomagnetic Storm

Space Weather, 2019
Between 7 and 8 September 2017, Earth experienced extreme space weather events. We have combined measurements made by the IMAGE magnetometer array, ionospheric equivalent currents, geomagnetically induced current (GIC) recordings in the Finnish natural ...
A. Dimmock, L. Rosenqvist, J.-O. Hall, A. Viljanen, E. Yordanova, I. Honkonen, Mats André, E. C. Sjoberg   +7 more
semanticscholar   +1 more source

Bursty Precipitation of Relativistic Electrons Unveiled by CIRBE/REPTile‐2 Measurements and Their Physical Implications

AGU Advances, Volume 7, Issue 1, February 2026.
Abstract Energetic electron precipitation plays a pivotal role in shaping Earth's radiation belt dynamics and drives significant physical and chemical changes in the upper atmosphere. However, the detailed mechanisms governing the loss of relativistic electrons have remained unclear, largely due to the limited energy coverage and coarse resolution of ...
Zheng Xiang, Xinlin Li, Daniel N. Baker, Qianli Ma, Yang Mei, Declan O’Brien, Hong Zhao, David Brennan, Theodore Sarris, Yoshizumi Miyoshi, Yoshiya Kasahara, Takefumi Mitani, Takeshi Takashima, Michael A. Temerin   +13 more
wiley   +1 more source

Ionospheric disturbances following the March 2015 geomagnetic storm from GPS observations in China

Geodesy and Geodynamics, 2018
When strong solar activities and geomagnetic storms happen, satellite communications and navigation system will be strongly disturbed. It is of great significance to monitor ionospheric disturbances, because empirical models cannot capture ionospheric ...
Wenxin Zhang, Xin Zhao, Shuanggen Jin, Junhai Li   +3 more
doaj   +1 more source

Probabilistic prediction of geomagnetic storms and the Kp index

Journal of Space Weather and Space Climate, 2020
Geomagnetic activity is often described using summary indices to summarize the likelihood of space weather impacts, as well as when parameterizing space weather models. The geomagnetic index K p in particular, is widely used for these purposes. Current
Chakraborty Shibaji, Morley Steven Karl
doaj   +1 more source

Solar cycle effect on geomagnetic storms caused by interplanetary magnetic clouds [PDF]

Annales Geophysicae, 2006
We investigated geomagnetic activity which was induced by interplanetary magnetic clouds during the past four solar cycles, 1965–1998. We have found that the intensity of such geomagnetic storms is more severe in solar maximum than in solar ...
C.-C. Wu, C.-C. Wu, C.-C. Wu, R. P. Lepping   +3 more
doaj   +1 more source

Multi-process driven unusually large equatorial perturbation electric fields during the April 2023 geomagnetic storm

Frontiers in Astronomy and Space Sciences
The low latitude ionosphere and thermosphere are strongly disturbed during and shortly after geomagnetic storms. We use novel Jicamarca radar measurements, ACE satellite solar wind, and SuperMAG geomagnetic field observations to study the electrodynamic ...
B. Fejer, S. R. Laranja, P. Condor
semanticscholar   +1 more source