3.2. Stress variation with depth before and after 2022
The cumulative ΔCFS distribution along the Tianzhu Seismic Gap at different depths induced by 12 historical earthquakes before 2022 and after 2022 is presented in Figures S1 (Supporting Information Text S3). Tables S3 (Supporting Information Text S3) summarizes the cumulative ΔCFS at different locations along the Tianzhu Seismic Gap at different depths before and after 2022. The stress pattern at different depths along the Tianzhu Seismic Gap was similar, while the stress values significantly changed. Taken as an example, varying depth from 5 km to 20 km changed the ΔCFS from -15.627 kPa to -11.914 kPa at the 2022 Menyuan earthquake hypocenter before 2022 (Figure S1a) (Table S3). The maximum ΔCFS increase after 2022 varied between 592.71 kPa and 1180 kPa and between 580.73 kPa and 1138.8 kPa in the MMSF (segment EF in Figure S1) and LHSF (segment FB in Figure S1), respectively, by varying depth from 5 km to 20 km (Table S3 in Supporting Information).