Calculation results of correlation coefficient of abnormal recording stations

Figure S2 represents calculation results of three channels’ CC and σSF for mainland China permanent stations with the repeating earthquakes near Japan island. The values of CC and σSF of the repeating earthquake waveforms recorded by 842 stations in mainland China are listed, of which 18 stations exceed the thresholds.
Figure S3 demonstrates calculation results of three channels CC and σSF for seismic networks in the southeast of China with repeating earthquakes near Taiwan island. The calculation results of three channels CC and σSF for repeating earthquakes near Taiwan island are listed; and stations with abnormal records were detected, of which one station had three channels outside of the confidence interval (HI.LSH) and five had one or two channels outside of the confidence area (HI.SLL, SC.TQ, FJ.PTLC, SC.BZH, SC.DFU).