Table 3
Statistics of the SMFR events associated with storms and substorms

Bz type	Number of events
	Storm	Substorm
	N	1 (2.2%)	9 (19.6%)
NS	10 (9.3%)	50 (46.7%)
SN	5 (5.7%)	56 (64.4%)
S	7 (10.1%)	46 (66.7%)
Total	23 (7.4%)	161 (52.1%)