Figure 3
Frequency-time analysis for continually occurring precursory tremors. Seismic signals and continuous spikes were recorded in the nearest TPN station before the main release. The black dotted rectangles at the bottom of the colour plot denotes the continuation of high frequency (> 32 Hz) impact that was dominated throughout the seismic waveform window. The waveform spectrum shows increase in seismic events with decrease in spacing with time before main detachment. The whole spectrum of continuous precursory signals is also analysed for seismic window (Fig. S5).
