Results 61 to 70 of about 13,257 (238)

A Study of the Morphology of Magnetic Storms: Moderate Magnetic Storms [PDF]

, 1957
Some average characteristics are determined for 136 moderate magnetic storms with sudden commencements that occurred during the interval 1902-1945.
Chapman, Sydney, Sugiura, Masahisa
core  

A New Global Climatological Model of the Equatorial Ionospheric Vertical E × B Drift: Integrating Ground‐Based Magnetometer, Radar, and Satellite Data Sets

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract We present a new empirical vertical E×B $\mathbf{E}\times \mathbf{B}$ drift model developed using ground‐based magnetometer, radar, and satellite data over equatorial latitude regions. We first implement an algorithm relating magnetometer derived equatorial electrojet (EEJ) and vertical ion plasma drift (equivalent to vertical E×B $\mathbf{E ...
John Bosco Habarulema, Daniel Okoh, Endawoke Yizengaw, Valence Habyarimana, Michael Pezzopane, Paulo Roberto Fagundes, Zama Katamzi‐Joseph, Mark B. Moldwin, Claudio Cesaroni, Danny Scipion   +9 more
wiley   +1 more source

Modeling and Risk Assessment of Geomagnetically Induced Currents During Geomagnetic Storm in the 500 kV Power Grid of Guangxi, China

Space Weather
Geomagnetic storms can induce geomagnetically induced currents (GIC) in power systems, posing threats to grid security. In this study, a GIC calculation model for the 500 kV power grid in Guangxi, China, is developed based on one‐dimensional (1D) and ...
Xuejian Zhang, Gilbert Pi, Zdeněk Němeček, Jana Šafránková, Tianqi Wang, Wenxin Kong, Chang Wei, Nian Yu   +7 more
doaj   +1 more source

Recent results and outstanding questions on the response of the electrodynamics of the low latitude ionosphere to solar wind and magnetospheric disturbances

Frontiers in Astronomy and Space Sciences
Storm-time ionospheric electrodynamics effects have been the subject of extensive studies. The solar wind/magnetosphere/ionosphere and thermosphere disturbance wind dynamos have long been identified as the main drivers of low latitude storm-time ...
Bela G. Fejer, Luis A. Navarro, Dibyendu Chakrabarty   +2 more
doaj   +1 more source

Geomagnetic disturbances analysis using discrete wavelets

Geofísica Internacional, 2008
Para estudiar periodicidades y tendencia en tormentas geomagnéticas se aplicó la transformada wavelet discreta, usando la función Daubechies. De entre una variedad de técnicas disponibles para analizar variabilidad, el análisis wavelets ha surgido en la última década como una herramienta estadística útil para este propósito.
Zossi Artigas, Marta Maria, Fernández de Campra, Patricia, Zotto, Elda Marina   +2 more
openaire   +5 more sources

Imprint of the Quasi‐Biennial Oscillation on the Ionosphere and Thermosphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The Quasi‐Biennial Oscillation (QBO) is a dominant mode of stratospheric variability and is known to modulate the variability of the ionosphere‐thermosphere (IT) system. However, the extent of its influence on the ionosphere‐thermosphere system remains uncertain due to weak signals and confounding with similar periodicities in solar flux.
D. Singh, L. P. Goncharenko, S. R. Zhang
wiley   +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

Observations of an extreme storm in interplanetary space caused by successive coronal mass ejections

, 2014
Space weather refers to dynamic conditions on the Sun and in the space environment of the Earth, which are often driven by solar eruptions and their subsequent interplanetary disturbances.
Bale, Stuart D., Farrugia, Charles J., Galvin, Antoinette B., Kajdič, Primož, Kilpua, Emilia K. J., Lavraud, Benoit, Liu, Ying D., Lugaz, Noé, Luhmann, Janet G., Möstl, Christian, Nitta, Nariaki V.   +10 more
core   +1 more source

ULF Wave Modulation of Energetic Electron Precipitation Caused by the Self‐Limiting of Space Radiation: May 2024 Superstorm Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The May 2024 geomagnetic superstorm provided the opportunity to explore how strong wave‐particle interactions affect energetic electron precipitation under intense driving. Using coordinated measurements from a balloon‐borne Timepix‐based X‐ray detector, ground‐based riometers and magnetometers, and Arase satellite observations, we identified ...
L. Olifer, D. Zhou, M. Patel, I. R. Mann, M. K. Hudson, A. W. Degeling, C. O. Heinke, G. R. Sivakoff, A. Kale, S. Kasahara, S. Yokota, K. Keika, T. Hori, T. Mitani, T. Takashima, Y. Kasahara, S. Matsuda, A. Shinbori, A. Matsuoka, M. Teramoto, K. Yamamoto, I. Shinohara, Y. Miyoshi   +22 more
wiley   +1 more source

Diurnal variations of cosmic ray geomagnetic cut-off threshold rigidities [PDF]

The spectrographic global survey method was used to investigate the rigidity variations Rc of geomagnetic cut-off as a function of local time and the level of geomagnetic disturbance for a number of stations of the world wide network.
Danilova, O. A., Dvornikov, V. M., Sdobnov, V. E., Sergeev, A. V., Tyasto, M. I.   +4 more
core   +1 more source