Inﬂuence of a single lightning on the electrical ﬁeld intensity of the air and on acoustic emission of near surface rocks

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Inﬂuence of a single lightning on the electrical ﬁeld intensity of the air and on acoustic emission of near surface rocks

Smirnov S.E., Marapulets Yu.V.

Institute of Cosmophysical Research and Radio Wave Propagation FEB RAS

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The eﬀect of inﬂuence of a single lightning on the electrical ﬁeld intensity in the near ground atmosphere
was investigated. The eﬀect appeared as a sharp fall of the value of intensity potential gradient from 80 V/m
up to minus 21 V/m. Then the ﬁeld returned to its level according to the formula of capacitor charge recovery
with the characteristic time of 17sec. Simultaneously with the electric ﬁeld a response of acoustic emission of
the near surface rocks in the range of frequencies 6.5 - 11 kHz to a lightning was found out.