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Observations of electrostatic field changes associated with K processes at different close ranges

Authors

Baoyou,  Zhu
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhou,  Helin
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Liu,  Feifan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ma,  Ming
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Lu,  Gaopeng
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Baoyou, Z., Zhou, H., Liu, F., Ma, M., Lu, G. (2023): Observations of electrostatic field changes associated with K processes at different close ranges, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4219


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021657
Abstract
<h1>Electrostatic field changes associated with K processes are known as K changes, which transfer significant charge moment during the discharge. By applying electric field change meters with the decay time constant of about 20-40ms, we report the observations of four cases of K changes by eight stations with sufficient time resolution and amplitude resolution. We find that the electric field changes of K processes appear as the typical step-like or ramp-like signatures at some places, however it can also suffer the polarity reversal thus appear as the hooked-like signature at closer places. An advancing streamer model was applied to account for signatures of electrostatic field changes at different places. It seems that K processes in this study involve a negative horizontal streamer, which serves to deposit negative charges at remote sources along the streamer channel, with a speed of the order of 107 m/s and the amount of charge involved of about a few tenths of coulombs.</h1>