Variation of some planetary seismic hazard indices on the occasion of Lefkada, Greece, earthquake of 17 November, 2015

Dimitrios N. Arabelos, Micheal E. Contadakis, George S. Vergos, Christos Skeberis, Tomas D. Xenos, Spiridon D. Spatalas


In this paper we investigate the variation of the tidal triggering effect efficiency, by means of the tidal seismicity compliance parameter p, and the lower Ionosphere variations, by means of the variation of the High-Frequency limit, fo, of the ionospheric turbulence content with the time and space proximity to the site of the earthquake occurrence as well as by the intensity variations of VLF signals transmitted over the seismic area. It is shown that the “Earth tides-seismicity compliance parameter” p may be used as a medium time earthquake warning while the frequency content of the ionospheric turbulence over the earthquake epicenter, deduced directly from GPS network TEC observations or indirectly through the VLF transmission network, may be used for the short time earthquake forecasting, deserving the special attention of the authorities, the scientists and the society.


Seismicity, Ionospheric turbulence, Brownian Walk, Hilbert Huang Transform

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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X