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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 6 | Copyright
Nat. Hazards Earth Syst. Sci., 14, 1383-1389, 2014
https://doi.org/10.5194/nhess-14-1383-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 02 Jun 2014

Research article | 02 Jun 2014

The results of experimental studies of VLF–ULF electromagnetic emission by rock samples due to mechanical action

A. A. Panfilov A. A. Panfilov
  • North-East Interdisciplinary Science Research Institute n. a. N. A. Shilo, Far East Branch, Russian Academy of Sciences (NEISRI FEB RAS), Magadan, Russia

Abstract. The paper presents the results of laboratory experiments on electromagnetic emissions excitation (the electric component of electromagnetic fields) by rock samples due to different forms of mechanical stress applications. It was shown that samples generate electric impulses with different spectra when the impact action, gradual loading or dynamic friction is applied. It was ascertained that level and spectral compositions of signals, generated by rock samples, change with an increasing number of hits. It was found that strong electromagnetic signals, generated while rock samples were fracturing, were accompanied by repetitive weak but perceptible variations in the electric field intensity in short frequency ranges.

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