Going north - and G2 storm watch!

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.

Image: Tromso Geophysical Laboratory.

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:

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:

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:

OE9HLH hearing MW1CFN, 14MHz WSPR.

Forecast aurora model at the time of peaks from central Europe.  Image: NOAA/SWPC.