Visibility I / V
Northern Lights Bong is a second game. When the Z-component fell in Nurmijärvi, I took pictures every few minutes. Only in the first box a dim ray stood out and in the second box something even weaker and then nothing more. For safety, I checked the northern camera in Tampere and there were clear rays 18:47:57 UTC. My camera's timestamp is 21:48:11 daylight saving time. The clock on my camera is 13 seconds ahead, so the first beam should probably be the same as in Tampere, whose camera is probably on time. The shutter speed of my camera was 3 s. Edit. Nurmijärvi Z fell more gently between two and three and another beam caught the cell at 2:34:45. That semmonen show. Edit 2 Tampere's camera is sensitive and the location is not even funnier. I used the stars to superimpose the images on top of each other. The performance was dim in Tampere as well and, based on a pair of images, represents the lower limit for Helsinki's observation. If the revos in Tampere rise above 25 degrees and are brighter, then in good weather in Helsinki the repos should stand out at 15 degrees, at least from the photographs with reasonable editing.