NDLI: Geomagnetic observations and ionospheric response during storm on 14 April 2006

Content Provider	CSIR - National Institute of Science Communication and Policy Research (NISCPR)
Author	Bakare, N. O. Adekoya, B. J. Chukwuma, V. U.
Abstract	A study of the intense geomagnetic storm on 14 April 2006 has been done using ionospheric data obtained from ionosonde station located in the American sector. The results indicate appearance of positive storm before the beginning of geomagnetic disturbance in the mid latitudes and occurrence of strong negative phase at the equator. It was observed that magnetospheric process, responsible for Dst decrease, was the enhancement of the plasma sheet and appeared to be caused by the combined effect of large intense proton density at 1400 hrs UT, southward turning of Bz at 1800 hrs UT and enhancement of speed stream at 1400 hrs UT on 13 April. The ionosonde stations located at American sectors are: College (64.9°N), Gakoma (62.4°N), Goose bay (53.3°N), Boulder (40.0°N), Dyess (32.2°N), Eglin AFB (30.4°N) and Puerto Rico (18.5°N). The present results were obtained using critical frequency foF2. The peak height of F2 layer hmF2 showed that the stations had some degree of simultaneity in the depletion of foF2 between 2000 hrs UT on 14 April and 0100 hrs UT on 15 April and that of hmF2 between 1600 and 1900 hrs UT on 15 April.
Ending Page	79
Starting Page	71
ISSN	03678393
e-ISSN	0975105X
Journal	Indian Journal of Radio & Space Physics (IJRSP)
Issue Number	02
Volume Number	39
Language	English
Publisher	Council of Scientific & Industrial Research (CSIR)
Publisher Date	2010-04-01
Access Restriction	Open
Subject Keyword	F2 region critical frequency (foF2) depletion Proton temperature Ion number density F2 layer peak height (hmF2) variation Solar wind flow speed Geomagnetic Storm Interplanetary Magnetic Field (IMF) Low latitude index Dst
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Physics and Astronomy

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