Fig. 2
From: Low-frequency earthquakes along the Ryukyu Islands triggered by teleseismic earthquakes
Waveforms of the triggered LFEs observed in the Yaeyama area. Broadband and short-period seismographs of the 2004 Sumatra earthquake. Upper part shows the instrumentally corrected broadband seismograph at IGK. Zero time denotes the occurrence time of the earthquake. The black and white triangles denote the estimated arrival time of the Rayleigh and Love waves, respectively. The velocity of the Rayleigh and Love waves is assumed to be 4.0 km/s and 3.4 km/s, respectively. The thick vertical bar shows the scale of the broadband seismograph. Lower part shows the 2–4 Hz bandpass-filtered short-period seismograph of the N–S component. The triggered LFEs were recorded at several stations. The waveforms are plotted from western stations to eastern stations along the trench