Example of the declustering method B (DCM-B) applied to the time series of |E| for Muonio station latitude and central longitude in Sweden between 11 October 2016 and 07 November 2016.(a) Example of the time series of SYM-H and AE geomagnetic indices. The shaded gray area indicates perturbed magnetosphere periods that are separated by at least 6 h of calm magnetospheric conditions as defined by −50 nT < SYM-H < 15 nT and AE < 50 nT and are represented by white areas. (b) Time series of |E| from 11 October 2016 to 07 November 2016, the horizontal blue dashed line corresponds to the threshold value P99 and P99.7, and the blue dots correspond to the exceedance value in each cluster (gray shaded area).