WASEM separation of artificial space-time diagram SUM. Vertical rows show the event with a selected time series at Y = 50″, the wavelet power spectrum, and the global wavelet spectrum GWS with characteristic periods P_ch above the global 95% significance level curve. PR is the selected period range. Part a: emergence of SUM = A1 + B1 + C1 events. Part b: event A1 separation according to the averaged global wavelet spectrum AGWS1 with L1 limit. Separated space-time diagrams A2 = PR >  L1 and PR <  L1. Selected time series of A2 with corresponding wavelet power spectrum. Part c: events B1 − C1 separation. AGWS2 with L2 limit. Separated space-time diagrams B2 = PR = L1 − L2 and C2 = PR <  L2. Selected time series of B2 and C2 with corresponding wavelet power spectra.