Real time three hours K index is here (to be used in apps for example): http://www.irf.se/maggraphs/preliminary_real_time_k_index_secondary
Real time 15 minutes K index is here (to be used in apps for example): http://www.irf.se/maggraphs/preliminary_real_time_k_index_15_minutes_secondary
IRF Kiruna magnetometer page: http://www.irf.se/mag
K-indices | Deflection in nT | Probability for aurora |
0 | 0 - 15 | Low |
1 | 15 - 30 |
2 | 30 - 60 |
3 | 60 - 120 | Medium |
4 | 120 - 210 |
5 | 210 - 360 |
6 | 360 - 600 |
7 | 600 - 990 | High |
8 | 990 - 1500 |
9 | 1500 and more |