## 5 Discussion
The results indicated that significant differences were concentrated near the relocated seismic source, with a mean difference of about 1.78 bar. Strike determines the angle between the fault plane and the regional stress field, which in turn affects the decomposition of normal stress and shear stress on the fault plane. Normal stress and shear stress are the core components of the Coulomb stress calculation. Different strikes result in different efficiency of stress transfer on the fault. For example, shear stress may be maximized when the strike of the fault is aligned with the direction of the maximum principal stress, thus significantly affecting the results of Coulomb stress calculations. Since the strike directly determines the geometry of the fault and its interaction with the stress field, even small changes in the strike may lead to significant changes in positive and shear stresses, which can have a large impact on the coulomb stress. Rake determines the degree of match between the fault slip direction and the regional stress field. Different slip directions can lead to different distributions of shear stresses in the fault plane, which affects the calculation of Coulomb stress changes. Changes in rake can lead to changes in fault type (e.g., from strike-slip faults to normal faults or reversed faults), which can have a significant impact on the calculation of coulomb stresses because different types of faults respond differently to the regional stress field. Although the rake has less of an effect than the strike, its change can still directly alter the interaction between the fault slip direction and the stress field, which can lead to significant changes in the Coulomb stress, especially if the fault type changes. There may also be complex interactions between different input parameters in Coulomb stress calculations. Uncertainty in the location of the epicenter may cause the values of strike, rake, and dip to deviate from the actual values. The direction of the principal stress axis in relation to strike, brake, and dip determines the propagation path of the seismic wave. If the direction of the principal stress axis deviates from the actual value, it may lead to inaccurate propagation of seismic waves. Therefore, the uncertainty in the location of the seismic source may lead to changes in the interaction relationship between the parameters, which in turn affects the results of the Coulomb stress calculations. Young's modulus and Poisson's ratio work together to determine the value of the effective coefficient of friction. Materials with larger Young's modulus and close Poisson's ratio may have a higher viscosity, which may affect the value of the effective coefficient of friction. Uncertainties in these input parameters may lead to errors in the computational results, which in turn may affect the propagation path of the seismic wave, the reflection characteristics, and ultimately the Coulomb stress distribution. We investigated \(\Delta CFS\) produced by eight earthquakes on earthquakes that occurred after them in the study area. Figure 6 depicts the \(\Delta CFS\) induced by the eight significant earthquakes on subsequent seismic events within the examined region (specific calculated values see Tables S7-S11 in Supplementary Materials). Given the presence of two nodal planes in the focal mechanism, two distinct values of \(\Delta CFS\) are computed for the same focal mechanism. The higher of the two calculated values is selected as the outcome of the analysis. The earthquakes in 2023 generated greater \(\Delta\)CFS values compared to the preceding four seismic events. Aftershocks can be triggered when the \(\Delta CFS\) value exceeds 0.1 bar [47; 48; 49]. While the three preceding earthquakes resulted in \(\Delta CFS>0\) for numerous subsequent seismic occurrences in the research area, occurrences surpassing the 0.1 bar threshold were limited (Table 3). The events with \(\Delta CFS>0.1\) bar in Figure 6a-c have a high repetition rate, and they have similar \(\Delta\)CFS values.