Flare occurrence as a function of McIntosh spot class Data combined over 1969 - 1976 (Kildahl 1980; M- and X-class events) and over December 1988 - June 1996 (NOAA/SWPC assocations of C-, M-, and X-class flares with active regions) [see Bloomfield et al. (2012), ApJ, 747, L41 for details on their application in Poisson forecasting and full verification testing] CLS = McIntosh active region class code C = # C-class flares observed from that spot class [decimal because Kildahl (1980) does not report C-class numbers so NOAA/SWPC C-class rates are used over both periods] M = # M-class flares observed from that spot class X = # X-class flares observed from that spot class N = # separate daily occurrences of that spot class CLS C M X N AXX 157.1 41 3 5265 BXO 340.8 59 3 5248 BXI 0.0 20 0 334 HRX 34.2 8 1 547 HSX 187.8 120 6 3931 HAX 67.2 27 0 820 HHX 11.5 17 2 203 HKX 19.5 9 0 87 CRX 0.0 0 0 1 CRO 152.4 23 2 1113 CRI 52.7 7 0 158 CSO 476.6 67 1 2524 CSI 128.6 18 2 225 CAO 418.6 56 3 1687 CAI 100.1 25 0 193 CHO 47.7 10 2 200 CHI 15.5 6 0 31 CKO 81.7 24 2 187 CKI 37.1 12 2 45 DRO 26.3 9 0 138 DRI 196.0 7 1 56 DSO 398.5 77 7 1099 DSI 248.5 37 1 285 DSC 0.0 5 2 20 DAO 911.2 152 6 2063 DAI 766.2 128 13 715 DAC 33.8 15 1 54 DHO 50.3 12 1 89 DHI 66.2 4 0 52 DHC 0.0 2 0 6 DKO 213.3 69 7 260 DKI 401.7 111 12 311 DKC 256.2 107 15 157 ERO 0.0 0 0 6 ERI 0.0 0 0 4 ESO 68.9 20 0 177 ESI 176.0 23 2 96 ESC 0.0 0 0 9 EAO 294.3 71 4 506 EAI 472.8 131 3 377 EAC 33.3 7 3 20 EHO 59.8 12 0 81 EHI 96.0 34 4 60 EHC 27.0 8 0 6 EKO 221.6 55 4 237 EKI 837.6 276 34 504 EKC 448.0 281 38 166 FRI 0.0 1 0 2 FSO 17.4 9 1 27 FSI 28.0 15 0 14 FAO 65.6 16 0 76 FAI 120.0 43 3 103 FHO 10.6 1 0 19 FHI 47.6 24 0 28 FHC 0.0 4 0 5 FKO 197.3 35 1 116 FKI 620.4 267 34 282 FKC 300.6 185 37 120