GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 2.1 - POSTER GNGTS 2023 Fig. 3. The signal from the Bafa transmitter from a couple of weeks before the occurrence of a moderate earthquake in Greece. The night-time power seems to be attenuated days before the seismic event. References Biagi, P.F.; Maggipinto, T.; Righetti, F.; Loiacono, D.; Schiavulli, L.; Ligonzo, T.; Ermini, A.; Moldovan, I.A.; Moldovan, A.S.; Buyuksarac, A.; Silva, H.G.; Bezzeghoud, M.; Contadakis, M.E.: 2011: The European VLF/LF radio network to search for earthquake precursors: Setting up and natural/man-made disturbances. Nat. Hazards Earth Syst. Sci., 11, 333–341. Blair, B. E., Crow, E. L. and Morgan, A. H.; 1967: Five years of VLF world-wide comparison of atomic frequency standards. Radio Sci., 2, 627-636. Casselman, C. J., Heritage, D. P. and Tribbals, M. L.; 1959: VLF propagation measurements for the Radux-Omega navigation system, Proc. IRE, 47, 829-839. Clilverd, M. A., Rodger, C. J., and Thomson, N. R. (1999). Investigating SeismoIonospheric Effects on a Long Sub-ionospheric Path. J. Geophys. Res. 104 (A12), 171–179. Fidani C.; 2009: Electromagnetic signals recorded by Perugia and S. Procolo (Fermo) stations before the L’Aquila earthquakes. Atti del 28th GNGTS, November 16-19, 2009, Trieste, 370-373. Fidani C.; 2010: ELF signals by Central Italy electromagnetic network in 2008-2010. Atti del 29th GNGTS, October 28-30, 2010, Prato, 175-179. Fidani, C.; 2011: The Central Italy Electromagnetic Network and the 2009 L’Aquila earthquake: observed electric activity. Geosci., 1, 3-25. Fidani, C. and Siciliani, M.; 2021: Characterization of VLF/LF signatures related to severe weather and strong earthquakes for geohazard risk reduction, 39th GNGTS, on-line, p. 47-51, June 22-24.