Results 231 to 240 of about 290,411 (293)

Investigation of a Neutral “Tongue” Observed by GOLD During the Geomagnetic Storm on May 11, 2019

Journal of Geophysical Research: Space Physics, 2021
The National Aeronautics and Space Administration Global‐scale Observations of the Limb and Disk (GOLD) mission observed a unique structure of thermospheric column density ratio of O to N2 (∑O/N2) during a geomagnetic storm on day of year (DOY) 130 (May ...
X. Cai, A. Burns, Wenbin Wang, L. Qian, S. Solomon, R. Eastes, W. McClintock, F. Laskar   +7 more
semanticscholar   +1 more source

Extreme Geomagnetic Storms – 1868 – 2010

Solar Physics, 2016
We present the first large statistical study of extreme geomagnetic storms based on historical data from the time period 1868 - 2010. This article is the first of two companion papers. Here we describe how the storms were selected and focus on their near-Earth characteristics.
Vennerstrom, S., Lefevre, L., Dumbović, Mateja, Crosby, N., Malandraki, O., Patsou, I., Clette, F., Veronig, A., Vršnak, Bojan, Leer, K., Moretto, T.   +10 more
openaire   +2 more sources

Randomness in Geomagnetic Storms

Fractals, 1997
Although geomagnetic forecasting is extremely important, geomagnetic predictions usually rely on forecasters' experience in distinguishing events expected to be geoeffective. Initial investigations with powerful forecasting techniques such as neural networks have recently been applied to geomagnetic prediction, but these are based on the assumption ...
Foti, M. A., Arizmendi, C. M.
openaire   +1 more source

GOLD Observations of the Merging of the Southern Crest of the Equatorial Ionization Anomaly and Aurora During the 10 and 11 May 2024 Mother's Day Super Geomagnetic Storm

Geophysical Research Letters
Using NASA's Global‐scale Observations of the Limb and Disk (GOLD) imager, we report nightside ionospheric changes during the G5 super geomagnetic storm of 10 and 11 May 2024.
D. Karan, C. Martinis, R. Daniell, R. Eastes, Wenbin Wang, William E. McClintock, R. Michell, S. England   +7 more
semanticscholar   +1 more source

Geomagnetic Index for Intense Ionospheric Storm

2019 Russian Open Conference on Radio Wave Propagation (RWP), 2019
© 2019 IEEE. From analysis of the geomagnetic activity indices aa and ap it is obtained that the index aa can be more adequate indicator of geomagnetic activity for the ionospheric parameters at periods of maxima of intense magnetic storms than ap. This is supported by analysis of the F2-layer critical frequency over Irkutsk station at the period of ...
Deminov M., Deminov R.
openaire   +2 more sources

The Mother's Day Geomagnetic Storm on 10 May 2024: Aurora Observations and Low Latitude Space Weather Effects in Mexico

Space Weather
On 10 May 2024, a severe geomagnetic storm coinciding with Mother's Day in Mexico lasted over 40 hr and produced polar auroras observable at low latitudes.
J. A. Gonzalez-Esparza, E. Sanchez‐Garcia, M. Sergeeva, P. Corona-Romero, L. X. Gonzalez‐Mendez, J. Valdés-Galicia, E. Aguilar-Rodriguez, M. Rodriguez-Martinez, C. Ramirez‐Pacheco, C. I. Castellanos, M. Pazos, B. Mendoza, V. J. Gatica-Acevedo, A. Melgarejo-Morales, R. Caraballo, E. Andrade-Mascote, P. Villanueva-Hernandez, R. Bonifaz‐Alfonzo, P. Sierra, E. Romero-Hernandez, I. Peralta-Mendoza, E. Pérez-Tijerina, J. Mejia-Ambriz, C. Guerrero-Peña, A. Caccavari, G. Cifuentes-Nava, E. Hernandez‐Quintero   +26 more
semanticscholar   +1 more source

Geomagnetic storm theory

Journal of Geophysical Research, 1960
A discussion of the two-gas theory of the transmission of geomagnetic disturbances through the atmosphere (to several earth radii) is extended, with the following results: (i) The central problem concerning the main phase of a geomagnetic storm is the mechanism of penetration of solar ions into the geomagnetic field.
openaire   +1 more source

Hydromagnetic theory of geomagnetic storms

Journal of Geophysical Research, 1959
A hydromagnetic theory is presented which explains the average characteristics of geomagnetic storms. The magnetic storm is caused by a sudden increase in the intensity of the solar wind. Stresses are then set up in the geomagnetic field by the solar plasma impinging upon the geomagnetic field and becoming trapped in it.
A. J. Dessler, E. N. Parker
openaire   +1 more source

Topside Ionospheric Conditions During the 7–8 September 2017 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, 2019
The uplooking total electron contents (TECs) from the GRACE, SWARM‐A, TerraSAR‐X, and MetOp‐A satellites and in situ electron density (Ne) from SWARM‐A were utilized to investigate the topside ionospheric conditions during the 7–8 September 2017 ...
O. Jimoh, J. Lei, J. Zhong, C. Owolabi, X. Luan, X. Dou   +5 more
semanticscholar   +1 more source