November 20: Solar wind speed remains rather low. Northern lights likely to be weak and faint tonight if Bz stays south, visibly pale-green but not very intense. Best viewing times around 10 pm to 01 am or so. Check real time data regularly and watch for the aurora on-switch, Bz south.
When the Bz value of the Interplanetary Magnetic Field points south, aurora is active. Faster solar wind expands the auroral oval. Higher density leads to more colourful displays.
A short-term forecast on the likelihood of seeing aurora.
Record of measurements at Leirvogur for the past 24 hours.
The chart shows 3 day forecast of the Kp-index with hourly interval
The chart shows the largest daily Kp-index value
