Additional file 1 of Slow slip events following the afterslip of the 2002 Mw 7.1 Hualien offshore earthquake, Taiwan

Additional file 1: Figure S1. Development of the onshore GNSS stations in the northeastern Taiwan region. a. Before the 2002 March 31 Mw 7.1 Hualien offshore earthquake. b. Before the 2005 SSE. c. After the 2005 SSE. The named stations are the same as Fig. 3 for the coseismic slip and afterslip inversion. Figure S2. GNSS three-component time series of coseismic offsets and postseismic displacements following earthquakes. The vertical line denotes the timing of the 2002 Mw 7.1 Hualien offshore earthquake. The black curves in each time series represent the secular velocity, annual and semi-annual movements, coseismic offsets, and postseismic displacements. The dotted lines denote the detrended GNSS velocities before the earthquake. EQ1 to EQ3 are the local earthquakes marked in Fig. 1. The location of the six GNSS stations is labeled in Fig. 3. Figure S3. Checkerboard test for the coseismic slip distribution of the 2002 Mw 7.1 Hualien offshore earthquake on the subducting plate interface. The synthetic input slip is generated with two standard deviation errors of 1.0 m. The onshore GNSS stations are the same as shown in Fig. 3.