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Influence of a single lightning discharge on the intensity of an air electric field and acoustic emission of near-surface rocks

Author(s): S. E. Smirnov | Y. V. Marapulets

Journal: Solid Earth
ISSN 1869-9510

Volume: 3;
Issue: 2;
Start page: 307;
Date: 2012;
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The effect was observed as a sharp fall of the electric potential gradient from +80 V m−1 down to –21 V m−1. After that the field returned to its normal level according to the formula of the capacitor discharge with 17 s characteristic time. Simultaneously, the response of the acoustic emission of surface rocks in the range of frequencies between 6.5 kHz and 11 kHz was evaluated.
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