Table 2

The number of epochs considered in SEAs for various reference series.

Reference series Threshold # of epochs
IntDst −50 nT 138
IntDst −40 nT 172
IntDst −30 nT 221
IntDst −25 nT 222
Int(d(SYM-H)/dt) −50 nT 154
Int(d(SYM-H)/dt) −40 nT 191
Int(d(SYM-H)/dt) −30 nT 218
Int(d(SYM-H)/dt) −25 nT 231

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