Table 3.
Environmental measures—correlation coefficients.
| Solar Wind | Kp Index | Ap Index | Sunspots | F10.7 | PC(N) | SRP | TMFV | Cosmic Rays | |
|---|---|---|---|---|---|---|---|---|---|
| Solar wind speed, Km/s | 1 | ||||||||
| Kp Index | 0.73 *** | 1 | |||||||
| Ap Index, nT | 0.65 *** | 0.94 *** | 1 | ||||||
| Sunspots, n | 0.18 *** | −0.08 * | −0.13 *** | 1 | |||||
| F10.7, sfu | 0.04 | −0.15 *** | −0.09 ** | 0.33 *** | 1 | ||||
| PC(N) index | 0.54 *** | 0.90 *** | 0.87 *** | −0.16 *** | −0.33 *** | 1 | |||
| SRP, pT | 0.11 ** | −0.11 ** | −0.06 | 0.30 *** | −0.09 ** | −0.10 ** | 1 | ||
| TMFV, pT | 0.78 *** | 0.87 *** | 0.90 *** | −0.13 *** | −0.09 * | 0.78 *** | 0.08 * | 1 | |
| Cosmic Ray, counts/min | −0.72 *** | −0.54 *** | −0.42 *** | −0.24 *** | −0.04 | −0.35 *** | 0.13 *** | −0.45 *** | 1 |
* p < 0.5, ** p < 0.01, *** p < 0.001 Abbreviations: sfu, solar flux units, 1 sfu = 10−22 watt per square meter-Hz.