Fig. 5

Stress fields around each target event used for slip tendency analysis. Focal mechanism solutions were used in the area shown with the same-colored rectangle and the different numbers in the top left corner of each square indicate the earthquake event. The results are shown using lower hemisphere projections. Red, green, and blue circles denote the optimal solution for the \({\sigma }_{1}\), \({\sigma }_{2}\), and \({\sigma }_{3}\), respectively. Small pastel red, green, and blue without outlines denote the 95% confidence ranges for the \({\sigma }_{1}\), \({\sigma }_{2}\), and \({\sigma }_{3}\), respectively. The black line and gray fan denote the best and 95% confidence ranges for the \({S}_{Hmax}\) orientation, respectively. \({\upphi }_{{\text{best}}}\) is the best value for the stress ratio (\(\phi (={\sigma }_{2}-{\sigma }_{3})/({\sigma }_{1}-{\sigma }_{3})\)) and the 95% confidence range for \(\phi\). \({{\text{N}}}_{{\text{a}}}\) is the number of focal mechanisms used for each stress inversion in each area