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G7IZU VLF STATION / SID DETECTOR - Click image
for full-size. THE ACTIVITY SUMMARY IS ACTIVE DURING DAYTIME ONLY!
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18k3 | 20k25 |
24k0 |
19k6 |
20k1 |
22k1 |
23k4 |
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D/L a
text file of detected alerts here
Above is a plot of
signals levels from various VLF UK and European radio stations over
the last 11 hours
(click it to open the full-sized image)
Note: The orange trace is showing the max level of either HWU 18k3,
ICV 20k25 or NAA 24k0.
This is the last six hours of GOES satellite X-Ray flux
data to compare
(please note the different time-spans). Below is the 3-day plot.
A "sudden ionospheric disturbance" (aka "SID") is evidenced by a
characteristic shark fin shaped waveform.
Further details and descriptions will be added later.
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