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We summarize the lightning data for 17 years from 1992 to 2008 obtained with lightning location systems of nine electric power utilities in Japan and analyze them. The observed annual number of lightning flashes of which the current is more than 10 kA is 400 000–800 000 and the 50% value of the cumulative distribution of lightning peak currents is about 23 kA in recent times. The variation of lightning...
17 years of lightning data from 1992 to 2008 obtained with lightning location system of 9 electric power companies in Japan have been summarized and analyzed. The recent annual number of lightning flashes of which current is more than 10 kA in Japan is around one million and the 50% value of cumulative distribution of lightning peak currents is about 20kA. The variation of lightning occurrence characteristics...
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