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Journal Articles Geoscientific Instrumentation, Methods and Data Systems Year : 2023

A VLF/LF facility network for preseismic electromagnetic investigations

Abstract

Earthquakes are one of the most frequently occurring natural disasters. Many indications have been collected on the presence of seismo-ionospheric perturbations preceding such tragic phenomena. Radio techniques are the essential tools leading the detection of seismo-electromagnetic emissions by monitoring at very low frequency (VLF, 3-30 kHz) and low frequency (LF, 30-300 kHz) sub-ionospheric paths between transmitters and receivers (Hayakawa, 2015). In this brief communication, we present the implementation of a VLF/LF network for searching earthquake electromagnetic precursors. The proposed system is comprised of a monopole antenna including a preamplifer, a GPS receiver and a recording device. This system will deliver a steady stream of real-time amplitude and phase-measurements and a daily recording VLF/LF data set. A first implementation of the system was done in Graz, Austria, the second one will be in Guyancourt, France, a third one in Réunion, France, and a fourth one in Moratuwa, Sri Lanka. In the near future, we are planning on expanding of our network for enhanced monitoring and increased coverage.

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Volcanology
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Dates and versions

insu-04076569 , version 1 (20-04-2023)
insu-04076569 , version 2 (13-12-2023)

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Patrick H. M. Galopeau, Ashanthi S Maxworth, Mohammed Y Boudjada, Hans U Eichelberger, Mustapha Meftah, et al.. A VLF/LF facility network for preseismic electromagnetic investigations. Geoscientific Instrumentation, Methods and Data Systems, 2023, 12 (2), pp.231-237. ⟨10.5194/gi-12-231-2023⟩. ⟨insu-04076569v2⟩
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