Figure 5
From: Earthquakes and very deep groundwater perturbation mutually induced
(a) Spatial distribution of cumulative slip for the Pohang mainshock. Black arrow indicates the cumulative slip vector, of which the amplitude is greater than 5 cm. Aftershocks whose magnitudes are greater than 2 are projected on the fault plane as white circles and ML 4.3 and 4.6 aftershocks are denoted as blue and green stars. (b) Stress drop estimated from the finite rupture model of (a). Projections of the crossing point of PX-2 and the trajectories of PX-1 and PX-2 are illustrated as an x symbol, solid blue lines, and red-dashed lines, respectively. (c, d) Changes in the mean stress with depth for PX-1 (c) and PX-2 (d). The changes in the mean stress at their trajectories are illustrated as red lines and those for the horizontally shifted trajectories are colored with the offset from the assumed fault plane. The open hole intervals are colored in pale red. In (a) and (b), the origin of the coordinate is set to the location of the main shock.
