Fig. 10From: Observation of the long-period monotonic seismic waves of the November 11, 2018, Mayotte event by Iranian broadband seismic stationsa Enlargement of the right side of the top plot of Fig. 3. JBE and MVLP waveforms can be seen. b Dominant periods of the waveforms in a. The dispersion of the surface waves is clear, and in the range of periods from 17.5 to 16.5 s is visible in the waveform (marked by red line). The red arrow indicates 09:58:38 UTC. c Notch filter output of the waveform with the notch in the period of 15.6 s and a bandwidth of 1 s. The black arrow indicates 09:59:09 UTCBack to article page