Plot of epoch-superposed D1 of increases (or decreases) of the daily number of anomalies as a function of time, considering the IntAp parameter. Solid lines indicate superposed daily rates of anomalies (upper row) or geomagnetic activity IntAp 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.