| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| sudden ionospheric disturbance | 1.21 | 1 | 2337 | 11 | 30 |
| sudden | 1.01 | 0.7 | 3038 | 47 | 6 |
| ionospheric | 1.37 | 1 | 7496 | 91 | 11 |
| disturbance | 1.98 | 0.2 | 5000 | 76 | 11 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| sudden ionospheric disturbance | 1.65 | 0.5 | 8174 | 91 |
| sudden ionospheric disturbance data | 1.43 | 0.8 | 4931 | 17 |
| sudden ionospheric disturbances 1937 | 0.08 | 0.3 | 7153 | 9 |
| sudden ionospheric disturbance sid | 0.66 | 0.5 | 4783 | 6 |
| sudden ionospheric disturbance monitor | 0.99 | 0.4 | 6378 | 91 |
| sudden ionospheric disturbance transmitter | 0.74 | 0.7 | 4736 | 84 |
| characterization of ionospheric disturbances | 1.93 | 0.3 | 4594 | 34 |
| ionospheric magnetic field disturbances | 0.65 | 0.1 | 5050 | 16 |
| ionospheric detection of natural hazards | 1.72 | 1 | 1936 | 33 |
| dissipation of currents in ionized media | 1.33 | 0.2 | 3343 | 6 |
