|ETNA RADIO OBSERVATORY
Live data from NICOLOSI (CT), Etna Park, Sicily
(To see on google map click this link http://g.co/maps/73ffv (Lat. 37°37'52.45"N - Long. 15°1'20.26"E)
System 1: INDUCTION COIL
ELF and ULF MAGNETIC FIELD
Here below the first LIVE spectrogram, updated every hour. It shows the last 8 hours ELF and ULF activity, as received by our coil (magnetic field).
Schumann resonances are marked in right side of the picture. Bottom part zooms on the 0,1 to 4 Hz range.
FFT resolution 10,5 mHz, scroll time 40 seconds.
Following the same signal, in 1 hour strips. Picture updated every hour
This is the frequency range of schumann resonances, and a zone of deep interest to us, for the study of possible interaction of magmatic flow with the terrestrial magnetic field. FFT resolution 168 mHz, scroll time 4.6 seconds.
Last spectrogram coming from coil shows daily strips, useful to compare activity from day to day, and to find anomalies. Picture updated every hour.
Scroll time 109 seconds and FFT resolution 10,5 mHz.
System 2: ORTHOGONAL LOOP
First spectrogram shows an RDF representation of last 2 hours of the entire VLF range: colors point the signals arrival direction. Picture updated every hour.
Scroll time 11188 mS , FFT resolution 84 mHz. Signal pre-filtered with Paul Nicholson's filter to reduce the hum noise.
And by the same reception system, the hourly multi strips:
Scroll time 4600 mS , FFT resolution 168 mHz. Signal pre-filtered with Paul Nicholson's filter to reduce the hum noise.
Daily strips of EW loop:
Scroll time 109 sec FFT resolution 84 mHz. Signal pre-filtered with Paul Nicholson's filter to reduce the hum noise.
System 3: GEOPHONE
Geophone Multistrip hourly representation, useful for local seismic and vulcanic events correlation:
Scroll time 4.6 sec, updated every hour.
Here below the real time situation about lighting strikes in Europe. Courtesy of http://www.blitzortung.org/
Unattended operations, signal
conditioning, spectrograms and RDF functions are
performed with SpectrumLab: http://www.qsl.net/dl4yhf/
. Many thanks to Wolfgang Buscher for his support.
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