Plots of epoch-superposed subsets D11 (left) and D12 (right) of variations of the daily number of anomalies as a function of time, considering the IntAp parameter. Solid lines indicate mean superposed daily rates of anomalies (upper row) or geomagnetic activity IntAp (in nT h) in the reference time series (bottom row) during Days −1 to +5 from the epoch (Day 0), whereas dashed lines show the same quantities for the remaining days. Error bars show the one-standard-deviation half-widths.