Fig. 1
From: A review of shallow slow earthquakes along the Nankai Trough
Example waveforms of a shallow slow earthquake at two stations: a inland F-net KMTF and b offshore DONET KMB07. Top, middle, and bottom traces are raw (non-filtered), tremor-, and VLFE-band vertical-component seismograms, respectively. Owing to characteristic noise at ocean bottom seismometers (Webb 1998), we selected the 0.03–0.06 Hz frequency band for a shallow VLFE at station KMB07. F-net KMTF, DONET KMB07, and the hypocenter of this event are illustrated by the black triangle, diamond, and yellow star, respectively. An example event occurred on 14:12 December 12, 2020 (JST)