Fig. 8
From: Precise tilt measurement by seafloor borehole tiltmeters at the Nankai Trough subduction zone
a Sensitive directions and local bathymetry, and b a schematic image of the response to tidal pressure change. The black and blue lines in the map on the left indicate the sensitive directions of the tidal response at the electrolytic and pendulum tiltmeters, respectively. The white arrow with a black edge indicates the direction of a cross-section of the schematic image show in (b). The color of the arrows in b indicates the pressure conditions. Red and blue arrows indicate relatively high and low pressures, respectively. The red and blue dashed lines indicate the compression and expansion of the sedimentary layer under high- and low-pressure conditions, respectively