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Long‐period prompt‐penetration electric fields derived from CHAMP satellite magnetic measurements
(American Geophysical Union, 2013-08-22)
The prompt penetration of the interplanetary electric field to the equatorial ionosphere is conveniently modeled with a frequency‐dependent transfer function. However, long‐period responses (>3 h) of previously estimated ...
Solar-wind magnetosphere effects in the middle and low latitude ionosphere
(2004-01-01)
Ionospheric electric fields play fundamental roles in the dynamics of the Earth's ionosphere and thermosphere. Enhanced geomagnetic activity has long been known to cause large ionospheric electric field and current ...
Superposed epoch analysis of the dayside ionospheric response to four intense geomagnetic storms
(American Geophysical Union, 2008-07-09)
Prompt daytime ionospheric responses are presented for the following four intense geomagnetic storms: 29 October 2003, 30 October 2003, 20 November 2003, and 7 November 2004. We perform a superposed epoch analysis of the ...
Middle‐ and low‐latitude ionosphere response to 2015 St. Patrick's Day geomagnetic storm
(American Geophysical Union, 2016-03-10)
This paper presents a study of the St Patrick's Day storm of 2015, with its ionospheric response at middle and low latitudes. The effects of the storm in each longitudinal sector (Asian, African, American, and Pacific) are ...
Sporadic E layer development and disruption at low latitudes by prompt penetration electric fields during magnetic storms
(American Geophysical Union, 2013-04-11)
An investigation of low‐latitude sporadic E layers during magnetic storms shows that the formation and disruption of these layers are strongly controlled by the magnetospheric electric fields that penetrate to equatorial ...
Unusual early morning development of the equatorial anomaly in the Brazilian sector during the Halloween magnetic storm
(Amer Geophysical Union, 2006-05-24)
The solar events that occurred at the end of October 2003 gave rise to very strong geomagnetic disturbances that peaked twice with Dst values reaching -345 nT around 0000 UT on 30 October and -400 nT around 2300 UT, on the ...
Unusual early morning development of the equatorial anomaly in the Brazilian sector during the Halloween magnetic storm
(Amer Geophysical Union, 2006-05-24)
The solar events that occurred at the end of October 2003 gave rise to very strong geomagnetic disturbances that peaked twice with Dst values reaching -345 nT around 0000 UT on 30 October and -400 nT around 2300 UT, on the ...
Low-latitude ionospheric disturbance electric field effects during the recovery phase of the 19-21 October 1998 magnetic storm
(American Geophysical Union, 2003-12-23)
Low‐latitude ionospheric electric fields and currents are often strongly disturbed during periods of enhanced geomagnetic activity. These perturbations can last for several hours after geomagnetic quieting. We use incoherent ...
Observations of the April 2002 geomagnetic storm by the global network of incoherent scatter radars
(European Geosciences Union (EGU), 2005-01)
This paper describes the ionospheric response to a geomagnetic storm beginning on 17 April 2002. We present the measurements of ionospheric parameters in the F-region obtained by the network of eight incoherent scatter ...
Ionospheric irregularity behavior during the September 6–10, 2017 magnetic storm over Brazilian equatorial–low latitudes
(2019-12-01)
The September 6–10, 2017 two-step magnetic storm was caused by an X9 solar flare followed by a CME. The SSC that occurred at 23:43 UT on day 06 when Sym-H reached about 50 nT, was due to a sudden increase in solar wind. ...