Coronal hole gamma detection?

Now the sun has well and truly set, yet southofhobart3 continues to be peaky. My other two stations remain normal, as does any geiger counter I care to switch on.
This may suggest a hardware problem - perhaps a dying GM tube in the array.
I will wait and see what happens....

I think it is unlikely that the sun can change ionizing radiation levels at the surface. Holes like this result in more particles getting out through the sun's outer layer, and are considered fast-moving, taking 1-3 days to reach Earth. Flares cause a Coronal Mass Ejection (CME) and can be slower, taking 1-4 days, but can be much more intense. Both can cause geomagnetic storms, but most of the ionizing activity happens above around 60,000 feet (18,300 m). What does reach the surface (for flares) is magnetic activity that can induce currents in transmission wires, like the 1989 event in Quebec Canada.

So I agree, it's likely an equipment issue.

Yes Bert490, It was a long shot. I was thinking gamma/xray bursts. But curious - the timing of the fault.
After checking all 4 Si-180g GM tubes and the GK-RadMon+, and finding no faults I changed the power supply. That seems to have fixed things....