IK1QFK VLF MONITORING STATION Live data from CUMIANA (TO), NW Italy, south Europe

(To see on google map click this link  (44,96° NORTH - 7,42° EAST)

System one, Electric Field: Marconi Antenna (Ogg/Vorbis Stream) + Geophone

Audio signals coming from Marconi antenna: a big "T" 11 m high with 30m long top hat.
You can listen the audio streaming live clicking here: http://78.46.38.217/vlf15.m3u
If using Windows Media Player you can't open the stream go to http://xiph.org/dshow/  and download the codec
named  "opencodecs_0.85.17777.exe" (2,53MB), or use VLC to reproduce it directly.

The audio streaming server is provided by Paul Nicholson.
See at Paul's page "Live VLF Natural Radio" for others audio stream available: http://abelian.org/vlf/

VLF monitoring

Here below the first LIVE spectrogram, updated 30 minutes.
It shows the last 8 hours VLF activity, as received by Marconi antenna (electric field).

• Channel 1, seismic monitor. Frequency range: 1 to 30 Hz for the top spectrogram. Signals coming from geophone I/O SENSOR Nederland b.v. model SM-4/UB8 (see at http://www.geophone.com/techpapers/SM-4%20Brochure.pdf) 40 dB amplified with a very low noise preamplifier.
• Channel 2, electric field. Frequency range: 1 to 105 Hz for the bottom one. Signals coming from Marconi antenna.

Picture, every 30 minutes, shows last 8 hours. All date and times are in UTC.
The scroll time is 40 s, and the frequency resolution 84 mHz.
As the receiving station is placed not too far from an industrial area, sometimes strong tones are detected by geophone sensor, caused by mechanical machine (1 km far from here).

Electric filed multistrip daily representation, useful for comparing anomalies from day to day:

Scroll time 110 sec, updated every 30 minutes.

Geophone Multistrip hourly representation, useful for local seismic events correlation:

Here below the same data elaborated as plotting traces. The picture shows the last 30 hours, and values are detected every 150 s.

Picture, updated every 30 minutes. Four traces are reported:

• Geophone trace , it shows the average and peak signals coming from the geophone sensor, in 1-20 Hz range.
• ULF noise 10 Hz , it shows the medium value between 3 and 30 Hz.
• ELF noise 100 Hz , it shows the medium value between 30 and 300 Hz.
• 2th SR freq. , it shows the frequency of second Schumann resonance (in Hz).

8 & 6 kHz dreamers band

Electric field coming from Marconi antenna: two short portions in 8.2 and 6.4 kHz band at very high frequency resolution, for testing transmission monitoring of radio experimenters.

It shows last month activity. Frequency resolution 50 µHz, spectrogram scroll time 1 hour.
Picture updated every 30 minutes.

System two, magnetic field: INDUCTION COIL
(see for construction details the article http://www.vlf.it/romero3/ics101.html)

Panoramic view captured from my garden, and a couple of Induction coils, orthogonally placed, inspected by a hen.

ULF magnetic field

Spectrum scale: magnetic components of the spectrogram below with long term average curve (red) and last waterfall line.
Frequency range 0.1 – 35 Hz, with a sensitivity of 1 pT at 1 Hz,  here with a 30 Hz low pass filter turned ON.

FFT resolution 10,5 mHz, scroll time 40 seconds. Schumann resonances are almost always visible: when not covered by local noise coming from 380 kV high power line.  Also the cars, passing 25 m away from the sensor, leave their trace in the area below 10 Hz. The coil is simply connected to the LINE input of a Realtek 97 audio card. Picture updated every 30 minutes. The spectrogram part below, 0,1 to 4 Hz, it is good for the PC1 detection.

Another representation from the same system:

Induction coil multistrip spectrogram, for shorter time event representation. Magnetic field received by induction coil. FFT with 168 mHz resolution, scroll time 4.5 sec.  More than 4 hours are showed. Picture updated every 30 minutes.

Multistrip daily representation, useful for comparing anomalies from day to day:

Scroll time 110 sec, 7 mHz resolution, updated every 30 minutes.

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://freenet-homepage.de/dl4yhf/spectra1.html . Many thanks to Wolfgang Buscher for his support.
Automatic FTP process is realized with SyncBack Freeware V3.2.14 http://www.2brightsparks.com/downloads.html.