Ionospheric perturbations related to the earthquake in Vrancea area on November 22, 2014, as detected by electromagnetic VLF/LF frequency signals

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Published: Nov 11, 2015
DOI: https://doi.org/10.4401/ag-6827
Keywords:
Seismic risk, Low frequency wave propagation, Earthquake precursors

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Maria Solovieva
Institute of Physics of the Earth, Russian Academy of Sciences, Moscow,
Alexander Rozhnoi
Institute of Physics of the Earth, Russian Academy of Sciences, Moscow,
Viktor Fedun
University of Sheffield, Dept. of Automatic Control and Systems Engineering, Space Systems Laboratory, Sheffield,
Konrad Schwingenschuh
Space Research Institute, Austrian Academy of Sciences, Graz,
Masashi Hayakawa
Hayakawa Institute of Seismo Electromagnetics Co. Ltd., Chofu, Tokyo, Japan; University of Electro-Communications, Chofu, Tokyo,

Abstract

Data from the European network of very low/ low frequency (VLF/LF) receivers has been used to study the response of the lower ionosphere to the earthquake of magnitude 5.5 in Vrancea area on November 22, 2014. Negative amplitude anomalies have been observed during 3 days before the earthquake and two days after, on the LF (45.9 kHz) signal passed above the seismic area. No perturbations have been found for the same signal in control paths during this period. Other possible influences both from above and below which can produce perturbations in the ionosphere have been taken into consideration.

Article Details

How to Cite
Solovieva, M., Rozhnoi, A., Fedun, V., Schwingenschuh, K. and Hayakawa, M. (2015) “Ionospheric perturbations related to the earthquake in Vrancea area on November 22, 2014, as detected by electromagnetic VLF/LF frequency signals”, Annals of Geophysics, 58(5), p. A0552. doi: 10.4401/ag-6827.
Issue
Vol. 58 No. 5 (2015)
Section
Physics of the Atmosphere

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