Open Access
Table 1.
Association of geomagnetic storms and solar wind flows in 1964–2011.
| Storm size | Events | CME-associated (%) | Stream (%) | Slow S.W. (%) | Uncertain events | |
|---|---|---|---|---|---|---|
| Solar minimum | Small | 991* | 15 | 77 | 8 | 91 |
| Medium | 391 | 27 | 70 | 3 | 39 | |
| Large | 73 | 52 | 48 | 0 | 3 | |
| Major | 38 | 87 | 13 | 0 | 3 | |
| Solar maximum | Small | 1128 | 44 | 48 | 7 | 110 |
| Medium | 557 | 63 | 35 | 1 | 33 | |
| Large | 146 | 90 | 9 | 1 | 4 | |
| Major | 115 | 100 | 0 | 0 | 0 | |
| Solar minimum | G1 | 733 | 16 | 79 | 5 | 64 |
| G2 | 234 | 34 | 65 | 2 | 25 | |
| G3 | 89 | 58 | 40 | 1 | 6 | |
| G4 | 25 | 92 | 8 | 0 | 0 | |
| G5 | 1 | 100 | 0 | 0 | 0 | |
| Solar maximum | G1 | 868 | 47 | 49 | 4 | 72 |
| G2 | 390 | 72 | 26 | 2 | 26 | |
| G3 | 156 | 94 | 5 | 1 | 3 | |
| G4 | 75 | 100 | 0 | 0 | 0 | |
| G5 | 11 | 100 | 0 | 0 | 0 |
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