Probability of auroras Probability of auroras estimated from the level of geomagnetic activity:Blue: no activityYellow: medium activityRed: high activityBlack: no data. Activity forecast, 1 hour Geomagnetic activity forecast based on solar wind data. The two values for the next hour give an interval, where RX will be at a 90 % probability. RX is the … Jatka artikkelin Space weather in Finland lukemista