Results 41 to 50 of about 241,838 (223)

What is a geomagnetic storm?

Journal of Geophysical Research: Space Physics, 1994
After a brief review of magnetospheric and interplanetary phenomena for intervals with enhanced solar wind‐magnetosphere interaction, an attempt is made to define a geomagnetic storm as an interval of time when a sufficiently intense and long‐lasting interplanetary convection electric field leads, through a substantial energization in the magnetosphere‐
Gonzalez, W., Joselyn, J., Kamide, Y., Kroehl, H., Rostoker, G., Tsurutani, B., Vasyliūnas, V.   +6 more
openaire   +3 more sources

Statistical nature of geomagnetic storms [PDF]

Journal of Geophysical Research: Space Physics, 1997
On the basis of geomagnetic activity indices and solar wind parameters, a superposed epoch analysis has been conducted for more than 300 geomagnetic storms. The intensity of magnetic storms is found to depend on the duration of the main phase; larger storms have longer timescales.
N. Yokoyama, Y. Kamide
openaire   +1 more source

The effect of continuous geomagnetic storms on enhancements of ultrarelativistic electrons in the Earth’s outer radiation belt

Frontiers in Astronomy and Space Sciences
Ultrarelativistic electrons (Ek > 3 MeV) are the most energetic electrons in the Earth’s outer radiation belt, which can cause serious damage to equipments on satellites. The evolutions of ultrarelativistic electrons during geomagnetic storm have been
Jingrun Chen, Jingrun Chen, Chaoling Tang, Chaoling Tang, Chaoling Tang, Xinxin Chu   +5 more
doaj   +1 more source

ASSESSMENT OF THE SEVERE GEOMAGNETIC STORM ON MAY 10-11, 2024 EFFECTS ON THE GEOMAGNETIC FIELD AND IONOSPHERE OVER THE INDONESIAN REGION

Rudarsko-geološko-naftni Zbornik
The severe geomagnetic storm on May 11, 2024, is the largest space weather phenomenon in the 25th solar cycle. This paper presents the impact of that severe geomagnetic storm (Dst = -412 nT) on the geomagnetic field and ionosphere over Indonesia ...
Anwar Santoso, Sismanto Sismanto, Rhorom Priyatikanto, Eddy Hartantyo, Emanuel Sungging Mumpuni, La Ode Muhammad Musafar Kilowasid, Abdul Rachman, Fitri Nuraeni, Siska Filawati, Erlansyah Erlansyah, Dadang Nurmali   +10 more
doaj   +1 more source

Neutral winds in the lower thermosphere observed by WINDII during the April 4–5th, 1993 storm

Geophysical Research Letters, 2000
Data from a major geomagnetic storm in April 1993 were selected for the first WINDII study of storm‐induced neutral winds in the lower thermosphere between 90 and 200 km.
Shengpan P. Zhang, Gordon G. Shepherd
doaj   +1 more source

After-effects of geomagnetic storms: statistical analysis and theoretical explanation

Solar-Terrestrial Physics, 2018
Our previous studies have shown the presence of daytime positive electron density disturb-ances during several days after the start of the recovery phase.
Ratovsky K.G., Klimenko M.V., Klimenko V.V., Chirik N.V., Korenkova N.A., Kotova D.S.   +5 more
doaj   +1 more source

Koudougou (Burkina Faso, Africa), GPS-TEC Response to Recurrent Geomagnetic Storms during Solar Cycle 24 Declining Phase

International Journal of Geophysics, 2023
In this paper, we presented the effect of moderate geomagnetic storms on the TEC variation at the Koudougou station (Geo Lat 12° 15′ N; Geo Long: -2° 20′ E) in Burkina Faso (Africa) during the descending phase of solar cycle 24.
Saguedo Sawadogo, Doua Allain Gnabahou, Sibri Alphonse Sandwidi, Frédéric Ouattara   +3 more
doaj   +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 Machine Learning‐Based Model of Three‐Dimensional Ion Fluxes in the High‐Altitude Earth's Northern Cusp

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract Magnetic reconnection at the dayside magnetopause is the primary pathway for transferring mass, momentum, and energy from the solar wind into the terrestrial magnetosphere. Previous studies have shown that the spatiotemporal dynamics of dayside magnetic reconnection can be inferred remotely from properties of Earth's cusps, specifically their ...
Gonzalo Cucho‐Padin, David Sibeck, Xueyi Wang, Daniel da Silva, Xiaolei Li, Gowtan Valluri, Cristian Ferradas, Hyunju Connor, Yu Lin   +8 more
wiley   +1 more source

Ionospheric Response to the Severe Geomagnetic Storm of 19–21 January 2026 over Almaty (Kazakhstan) According to the Digisonde and GPS Data

Sensors
We present observations of the ionospheric response to the severe geomagnetic storm of 19–21 January 2026, obtained using a Digisonde DPS-4D and GPS-based vertical Total Electron Content (TEC) measurements over Almaty, Kazakhstan.
Galina Gordiyenko, Yurii Litvinov, Murat Zhiganbayev, Valentina Grichshenko, Serik Nurakynov, Alexey Andreyev, Vlad Zhigalov   +6 more
doaj   +1 more source