The same as Figure 11, for occurrence frequencies of large events, defined as exceeding the 95-perecentile of that parameter. Hence the top row shows the occurrence frequency of the 3-hourly means of the power input to the magnetosphere exceeding their 95-percentile, f[P_α > q(0.95)], the middle row shows the corresponding occurrence frequency for the am index, f[am > q(0.95)]; and the bottom row shows the corresponding occurrence frequency for [B_S]_GSEQ, f[B_S,GSEQ > q(0.95)].