Table 1.
Summary of the three DD classification schemes
| DD type | Smith 1973 | Preliminary classification (v1) (for DDs with HTcc > 0.9) | Final classification (for DDs with HTcc > 0.9) |
|---|---|---|---|
| TD | Bn/Bmax < 0.4 & [B]/Bmax > 0.2 | (Bn/Bmax < 0.4 & [B]/Bmax > 0.2) or (Bn/Bmax < 0.4 & [B]/Bmax < 0.2 & (|Wcc|< 0.9 or (|Wcc|> 0.9 & (|Ws|< 0.5 & |Q|< 0.7))) | Bn/Bmax < 0.4 |
| RD | Bn/Bmax > 0.4 & [B]/Bmax < 0.2 | (Bn/Bmax > 0.4 & [B]/Bmax < 0.2) or (Bn/Bmax < 0.4 & [B]/Bmax < 0.2 & (|Wcc|> 0.8 & |Ws|> 0.5 & |Q|> 0.7) | Bn/Bmax > 0.4 & [B]/Bmax < 0.2 |
| ED | Bn/Bmax < 0.4 & [B]/Bmax < 0.2 | Any event that has Bn/Bmax < 0.4 & [B]/Bmax < 0.2 but not included in RD or TD group | |
| ND | Bn/Bmax > 0.4 & [B]/Bmax > 0.2 | Bn/Bmax > 0.4 & [B]/Bmax > 0.2 | Bn/Bmax > 0.4 & [B]/Bmax > 0.2 |
Notes. 1st column: The DD classes (see text). 2nd: The original magnetic field-based classification from Smith (1973). 3rd: Preliminary classification using the Walén test. 4th: The final classification of our study after evaluating and grouping all distinct populations.
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