Visibility IV / V
I followed the development of the geomagnetic storm throughout the day and in the evening it began to look strongly that something could be visible as soon as it got dark. This was the case, the northern sky was covered with a dim aurora borealis, and quite surprisingly an active arc of northern lights was visible in the southern sky (Fig. 2). The greatest enthusiasm for the northern lights has already passed in my case, when I couldn't stand the occasional balcony observation any more. A couple of sub-storms momentarily produced bright northern lights e.g. at about 9.40 and 23.20. From the latter, however, I got a few squares (Figure 1), though the clouds began to drip into the sky to disturb them. After all, it is always a rare treat for both of them that northern lights can be seen in Stad's light pollution!