Geomagnetic Disturbances and Its Impact on Ionospheric Critical Frequency (foF2) at High, Mid and Low Latitude Region
American Journal of Astronomy and Astrophysics
Volume 2, Issue 6, November 2014, Pages: 61-65
Received: Nov. 14, 2014;
Accepted: Dec. 12, 2014;
Published: Dec. 19, 2014
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Roshni Atulkar, National Institute of Technical Teachers’ Training and Research, Bhopal (MP), India
Shivangi Bhardwaj, Space Science Laboratory, Barkatullah University, Bhopal (MP), India
Prakash Khatarkar, Space Science Laboratory, Barkatullah University, Bhopal (MP), India
Purushottam Bhawre, Space Science Laboratory, Barkatullah University, Bhopal (MP), India
P. K. Purohit, National Institute of Technical Teachers’ Training and Research, Bhopal (MP), India
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A geomagnetic storm is a major disturbance of Earth's magnetosphere that occurs when there is a very efficient exchange of energy from the solar wind into the space environment surrounding Earth. During solar and geomagnetic activities, critical frequency of F2 layer (foF2) varies in a great extent. In this Study, our main aim is to examine the effect of solar and geomagnetic activities on the critical frequency (foF2) during January 2014 to April 2014 respectively. One magnetic intense storm occurred on 19 February with (Dst -112) and other moderate storm occurred on 12 April 2014 with (Dst -80). In our study, we have analyzed these effects on critical frequency of F2 layer for ionospheric monitoring. We have used ionospheric data at Low, mid and high latitude station. The absorption and ionization of the ionospheric medium depends on solar activity. The value of foF2 increased from their normal value at all the three latitudes. This is due to geomagnetic storms that occurred around the same time. A very interesting feature that can be seen in the figures is that the increase of foF2 at Low latitude is much more intense as compare to high and mid latitude. Comparison among all the latitudes shows that the values of foF2 at high latitude are quite less as compared to low and mid latitude. We have found that the effect of solar and geomagnetic storm disturbances is strongest at the low latitude and weakest at the high latitude during the geomagnetic storm time.
Geomagnetic Disturbance, Critical Frequency, Ionosphere, Storm
To cite this article
P. K. Purohit,
Geomagnetic Disturbances and Its Impact on Ionospheric Critical Frequency (foF2) at High, Mid and Low Latitude Region, American Journal of Astronomy and Astrophysics.
Vol. 2, No. 6,
2014, pp. 61-65.
Gonzalez, W. and Tsurutani, B.T. Planet, Space Sci., 35, 1987, 1101.
Batista S.inez,Depaula E.R.,Abdu.N.B,Trivedi N.B,Ionospheric effect of the march 13,1989,Magnetic Strom at Low and Equatorial latitudes,Journal of Geophysical Research,Vol.96,no.A8,pp13,943-13952.
Proless, G.W.,On Explaining the local time variation of ionospheric strom effects.Ann.Geophysics,11,1-9,1993a.
Khatarkar P., Purohit P.K., Gwal. A.K., Study of ionospheric F2 layer characteristics at low,mid and high latitudes.International Journal of Science and Research(IJSR)vol.3 Issue 9, ISSN 2319-7064,2014.
M. M. Fares Saba, W. D. Gonzalez, A. L. CluÂ a de Gonzalez Relationships between the AE, ap and Dst indices near solar minimum (1974) and at solar maximum (1979), Ann. Geophys. 15, 1265-1270,
I. Tsagour, A. Belehaki, G. Moraitis and H. Mavromichalaki. Positive and negative ionospheric disturbances at middle latitudes during geomagnetic storms. Geophysical Research Letters, Vol. 27, No. 21, p. 3579-3582, November 2000
Matthias Forster and Norbert Jakowski.Geomagnetic strom effects on the Topside ionosphere and plasmasphere:A Compact Tutorial and New results. Surveys in Geophysics 21: 47–87, 2000.
Mukherjee S. , Shivalika S. ,Purohit P.K ,.Gwal. A.K, Effect of Geomagnetic Storms in the Equatorial Anomaly Region observed from ground based data.International journal ofgeomatics and geosciences Volume 1, No 3, 2010.
A.O. Adewale, E.O. Oyeyemi, A.B. Adeloye, M.B. Adedokun. Ionospheric effects of geomagnetic storms at Hobart and comparisons with IRI model predictions. Journal of Sci. Res. Dev. 2013, Vol. 14, 98 – 105.
Wang.X,Shi J.k., Wang G.J.,Zherebtsov G.A.,Pirog O.M.,Responses of ionospheric foF2 to geomagnetic activities in Hainan.Advances in space research 41(2008),556-561.
Mayaud P.N,. Derivation, meaning and use of geomagnetic indices.AGU Geophys. Monogr. vol. 22, 1980, 1980.