Initial results on solar flare effect on 24.8 kHz subionospheric propagation over long path to Suva

Kumar, Abhikesh; Kumar, Sushil

doi:10.1071/sp08013

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2010

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“…Different Solar-Terrestrial phenomena like solar X-ray flares, solar proton events, geomagnetic storm and lightening cause electromagnetic radiation and perturb the ionosphere [1][2][3][4][5]. The present paper explores diurnal and seasonal variation of amplitude and its correlation with A p and 10.7 cm solar radiation.…”

Section: Introductionmentioning

confidence: 99%

A correlation study of solar activity index and amplitude of VLF trans-equatorial propagation

Pal¹,

Bhowmik

Roy

et al. 2010

Indian J Phys

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Diurnal and seasonal behavior of amplitude of NWC 22.3 kHz signal transmitted from Australia (22 0 49 / S, 114 0 23 / E), and received at Kolkata (22 0 34 / N, 88 0 24 / E), India have been investigated The signal amplitude is remarkably low in October. The variations of daily maximum and daily minimum of signal amplitude have been analyzed. The signal on the present propagation path showed non-correlation with A p index, but showed a moderate but negative correlation with 10.7 cm solar flux.

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Section: Introductionmentioning

confidence: 99%