Fig. 6: Pore pressure and Coulomb static stress transfer modeling.
From: Causal mechanism of injection-induced earthquakes through the Mw 5.5 Pohang earthquake case study
The model results are for the Mw 3.2 foreshock location (top row, a–c) and the Mw 5.5 mainshock location (bottom row, d–f). Pore pressure modeling results (a, d) for Case A (black dashed) and Case B (blue). Coulomb static stress transfer modeling results (b, e) at each location using a Young’s modulus of 80 GPa (red) and 50 GPa (red dashed). Total Coulomb stress change (c, f) is calculated by adding modeled pore pressures multiplied by a coefficient of friction of 0.6 and the Coulomb static stress change. Results for modeling using a Young’s modulus of 80 GPa is in blue and dashed black; modeling using a Young’s modulus of 50 GPa is in gray. The Mw 3.2 event is marked in the first row by a vertical gray solid line and the Mw 5.5 event is marked in the second row by a vertical black line. Source data are provided as a Source Data file.
