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The European VLF/LF Radio Network: Advances and Recent Results. Geophysical
Biagi, P.F.; Maggipinto, T.; Schiavulli, L.; Ligonzo, T.; Ermini, A.; Martinelli, G.; Moldovan, I.; Silva, H.; Bezzeghoud, M.; Contadakis, M.Since 2009 a network of VLF (20-60 kHz) and LF (150-300 kHz) radio receivers has been put into operation in Europe in order to study earthquakes precursors. At the moment the network consists of ten receivers three of which are located in Italy, two in Greece and one in Portugal, Romania, Malta, Cyprus and Turkey. The data (sampling rate of 1min) are downloaded automatically at the end of each day and are colle...
Wavelet analysis of the LF radio signals collected by the European VLF/LF netwo...
Righetti, F.; Biagi, F.; Maggipinto, T.; Schiavulli, L.; Ligonzo, T.; Ermini, A.; Moldovan, I.A.; Moldovan, A.S.; Buyuksarac, A.; Silva, H.G.In 2008, a radio receiver that works in very low frequency (VLF; 20-60 kHz) and LF (150-300 kHz) bands was developed by an Italian factory. The receiver can monitor 10 frequencies distributed in these bands, with the measurement for each of them of the electric field intensity. Since 2009, to date, six of these radio receivers have been installed throughout Europe to establish a ‘European VLF/LF Network’. At pr...
Anomalies Observed in VLF and LF Radio Signals on the Occasion of the Western T...
Biagi, F.; Righetti, F.; Maggipinto, T.; Schiavulli, L.; Ligonzo, T.; Ermini, A.; Moldovan, I.A.; Moldovan, A.S.; Silva, H.G.; Bezzeghoud, M.VLF radio signals lie in the 10 - 60 kHz frequency band. These radio signals are used for worldwide navigation support, time signals and for military purposes. They are propagated in the earth-ionosphere wave-guide mode along great circle propagation paths. So, their propaga-tion is strongly affected by the ionosphere conditions. LF signals lie in 150 - 300 kHz frequency band. They are used for long way broadca...
The European Network for studying the radio precursors of earthquakes: Principa...
Maggipinto, T.; Biagi, P.F.; Righetti, F.; Schiavulli, L.; Ligonzo, T.; Ermini, A.; Moldovan, I.A.; Moldovan, A.S.; Silva, H.G.; Bezzeghoud, M.Since 2009 a network of VLF (20-60 kHz) and LF (150-300 kHz) radio receivers was put into operation in Europe in order to study the disturbances produced by the earthquakes on the propagation of these signals. In 2011 the network for LF signals was formed by six receivers located two in Italy and one in Greece, Portugal, Romania, and Turkey. The LF radio data collected during about two years have been analysed....
The European Network for studying the radio precursors of earthquakes: the case...
Biagi, P.F.; Righetti, F.; Maggipinto, T.; Schiavulli, L.; Ligonzo, T.; Ermini, A.; Moldovan, I.A.; Moldovan, A.S.; Silva, H.G.; Bezzeghoud, M.Since 2009 a network of VLF (20-60 kHz) and LF (150-300 kHz) radio receivers was put into operation in Europe in order to study the disturbances produced by the earthquakes on the propagation of these signals. In 2011 the network was formed by nine receivers located three in Italy and one in Austria, Greece, Portugal, Romania, Russia and Turkey. On May 19, 2001 an earthquake with Mw=5.7 occurred in western Turk...
Analysis of the LF data collected by the European radio network during one year
Biagi, P.F.; Righetti, F.; Maggipinto, T.; Ermini, A.; Moldovan, I.; Moldovan, A.; Buyuksarac, A.; Silva, Hugo Gonçalves; Bezzeghoud, MouradDuring 2008 a radio receiver was developed by the Italian factory Elettronika. The receiver is an equipment working in VLF (15-60 kHz) and LF (150-300 kHz) bands. It can monitor 10 frequencies distributed in these bands and, for each of them, saves the electric field intensity. During 2009 six receivers were installed for the realization of the “European VLF/LF network”. Actually, two of them are into operation ...
The European VLF/LF radio network to search for earthquake precursors: setting ...
Biagi, P.F.; Maggipinto, T.; Righetti, F.; Loiacono, D.; Schiavulli, L.; Ligonzo, T.; Ermini, A.; Moldovan, I.A.; Moldovan, A.S.; Buyuksarac, A.In the last years disturbances in VLF/LF radio signals related to seismic activity have been presented. The radio data were collected by receivers located on the ground or on satellites. The ground-based research implies systematic data collection by a network of receivers. Since 2000 the “Pacific VLF network”, conducted by Japanese researchers, has been in operation. During 2008 a radio receiver was developed ...
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