Open Access
Table 1
Criteria used to define ICMEs and SIRs.
| ICME | SIR | |
|---|---|---|
| B | Enhanced and smoothly rotating | Compressed with a maximum during the velocity increase |
| V | Monotonically decreasing | Increasing |
| N p | Compressed in the earliest part of the velocity increase | |
| T | Low | Increasing |
| β | Low | |
| Downstream/upstream region | Possibly preceded by a sheath and a shock | Possibly followed by a HSS region |
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