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Disturbances in LF radio-signals as seismic precursors
radio signals seismicity precursors
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2015/9/28
Low Frequency (LF) radio signals lie in the band 30-300 kHz. Monitoring equipment able to measure the electric strength of such signals, at field sites with very low noise levels, were designed and as...
An overview on preseismic anomalies in LF radio signals revealed in Italy by wavelet analysis
LF radio-waves wavelet seismicity precursors
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2015/9/1
Since 1996, the electric field strength of the two broadcasting stations MCO (f=216 kHz, southeast France) and
CZE (f=270 kHz, Czech Republic) has been sampled every ten minutes by a receiver (AS) lo...
Anomalies Observed in VLF and LF Radio Signals on the Occasion of the Western Turkey Earthquake (Mw = 5.7) on May 19, 2011
Earthquake Precursors European Radio Network Radio Signal Analysis
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2013/3/11
Since 2009 a network of VLF (20 - 60 kHz) and LF (150 - 300 kHz) radio receivers is operating in Europe in order to study the disturbances produced by the earthquakes on the propagation of these signa...
VLF-LF radio signals collected at Bari (South Italy): a preliminary analysis on signal anomalies associated with earthquakes
VLF-LF radio signals a preliminary analysis signal anomalies earthquakes
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2009/12/14
At the beginning of 2002 an OmniPAL receiver was put into operation at the Department of Physics of Bari University (Southern Italy). The electric field strength of five VLF-LF signals transmitted fro...
Investigation of over-horizon VHF radio signals associated with earthquakes
over-horizon VHF radio signals earthquakes
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2009/12/9
This paper presents the preliminary results on the possible reception of over-horizon VHF radio signals from a FM (frequency modulation) transmitter during abnormal situations (probably in close assoc...
Possible earthquake precursors revealed by LF radio signals
Possible earthquake precursors LF radio signals
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2009/12/9
In this case, it is possible that the pre-seismic processes could have produced irregularities in the troposphere, such as ducts, reflecting layers and scattering zones, so that some local troposphere...
Anomalies in VLF radio signals prior the Abruzzo earthquake (M=6.3) on 6 April 2009
Anomalies VLF radio signals Abruzzo earthquake (M=6.3)
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2009/12/8
The VLF/LF radio signals method for studying preseimic activity is applied to the Abruzzo earthquake (M=6.3, 6 April 2009). The data collected by three receivers located in Moscow (Russia), Graz (Aust...
Decrease in the electric intensity of VLF/LF radio signals and possible connections
Decrease electric intensity VLF/LF radio signals possible connections
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2009/12/30
In February 2002, a receiver was put into operation at the Department of Physics of Bari University (Southern Italy) to record VLF-LF radio signals. The intensity and the phase of the signals transmit...
Global diagnostics of the ionospheric perturbations related to the seismic activity using the VLF radio signals collected on the DEMETER satellite
Global diagnostics ionospheric perturbations seismic activity VLF radio signals
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2009/12/29
The analysis of the VLF signals radiated by ground transmitters and received on board of the French DEMETER satellite, reveals a drop of the signals (scattering spot) connected with the occurrence of ...