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Title: Unusual sferics observed at Agra
Authors: Pandey, Uma
Bajpeyi, Anubha
Mishra, Madhurima
Sharma, Abhishek
Singh, Birbal
Keywords: Banded sferics
Narrow band sferics
Solar flares
Magnetic storm
Specular reflection
Issue Date: Aug-2011
Publisher: NISCAIR-CSIR, India
PACS No.: 96.60.qe; 94.30.Lr; 92.60.Pw
Abstract: Employing the experimental setup intended for whistler observations, a large number of unusual sferics have been recorded at the low latitude ground station Agra (geomagnetic latitude 18.09°N, longitude 152.21°E) during six months of observations between 01 November 2009 and 30 April 2010. The data include banded and narrow band sferics whose occurrences are found to be enhanced occasionally. The results have been examined as possible effects of lightning, solar flare, magnetic storms, and earthquake. The unusual enhancement of all types and those of banded structures have been found to correlate positively with X-ray events and magnetic storms, respectively. The banded and unusual structures of sferics have been interpreted in terms of specular reflection from a slab of enhanced ionization existing at the base of the ionosphere.
Page(s): 183-190
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-105X (Online); 0367-8393 (Print)
Source:IJRSP Vol.40(4) [August 2011]

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