Last night saw a brief period of disturbance of the geomagnetic field at high latitudes, with a sharp swing of the Z (vertical) component to northwards. A G2-level storm is forecast for 31 August through to September 01, which will make for interesting WSPR results-gathering and the following auroral Es for higher-HF band operation.
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| Image: Tromso Geophysical Laboratory. |
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This peak in the northwards trend - between about 03:20 and 03:50UT - is very clearly revealed in the 14MHz WSPR data gathered overnight.
Here's OE9GHV hearing my 1W. The 03:24UT spike caused by the northwards-going field happens conveniently just before normal early morning propagation much affects the signal:
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| OE9GHV hearing MW1CFN, 14MHz WSPR |
Next, how TF1VHF heard my 1W, revealing a spike at 03:46UT, consistent with the timing of the field peak at higher latitudes:
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| TF1VHF hearing MW1CFN, 14MHz WSPR. |
And lastly, just to reinforce the data, how OE9HLH heard me, showing the spike in signal strength, again, as in the case of OE9GHV, timed at 03:24UT:
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| OE9HLH hearing MW1CFN, 14MHz WSPR. |
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| Forecast aurora model at the time of peaks from central Europe. Image: NOAA/SWPC. |
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