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Table 1.
Hemispheric asymmetry of spot group numbers for solar cycles 12–23.
| Cycle no | NN | NS | Aobs | P(|Ab| ≥ |Aobs|) |
|---|---|---|---|---|
| 12 | 646 | 1056 | −0.241 | 2.23 × 10−23 |
| 13 | 910 | 881 | 0.016 | 0.508 |
| 14 | 800 | 845 | −0.027 | 0.278 |
| 15 | 1172 | 1026 | 0.066 | 1.98 × 10−3 |
| 16 | 1042 | 932 | 0.056 | 1.41 × 10−2 |
| 17 | 1278 | 1248 | 0.012 | 0.564 |
| 18 | 1411 | 1419 | −0.003 | 0.895 |
| 19 | 1975 | 1443 | 0.156 | 8.97 × 10−20 |
| 20 | 1564 | 1320 | 0.085 | 5.97 × 10−6 |
| 21 | 1504 | 1545 | −0.013 | 0.469 |
| 22 | 1054 | 1286 | −0.099 | 1.76 × 10−6 |
| 23 | 1232 | 1409 | −0.067 | 6.13 × 10−4 |
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