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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.38 no.4 (2011), pp. 433-447
AILA-2009: Its Effects on VLF IFIA and Probable Scientific Explanation
S.S. De1, B. Bandyopadhyay1, S. Paul1, D.K. Haldar1, M. Sanfui1, B.K. De2, S. Chattopadhyay1, A.K. Kundu1, S. Barui1
1Centre of Advanced Study in Radio Physics and Electronics, University of Calcutta, Kolkata 700 009, India
2Department of Physics, Tripura University, Suryamaninagar, Tripura 799 130, India
go back1Centre of Advanced Study in Radio Physics and Electronics, University of Calcutta, Kolkata 700 009, India
2Department of Physics, Tripura University, Suryamaninagar, Tripura 799 130, India
Abstract. Remarkable effects of severe electrical activity of a thunderstorm (AILA) have been observed on May 25, 2009 on the records on Integrated Field Intensity of Atmospherics (IFIA) at frequencies 3 kHz and 9 kHz over Kolkata (latitude: 22.56oN, longitude: 88.5oE). It was followed by severe thundershowers and lightning. The outcome of scientific evaluation of the recorded data along with some other specific characteristics will be presented in this paper.