Fig. 2
From: Triggered tremors beneath the seismogenic zone of an active fault zone, Kyushu, Japan
Seismic records of the 2012 Sumatra earthquake recorded at the stations shown in Fig. 1. The top fifteen waveforms are the north-south (NS) components of bandpass-filtered seismograms (2–8 Hz). The bottom three traces are three components (vertical, radial, and transverse from the epicenter) recorded by the broadband seismometers installed at station “smt.” Orange lines indicate the tremor signals analyzed in this study. The lapse time starts at 17:57 hours on 11 April 2012, in Japan Standard Time