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.

附加文件1：图S1。台湾东北部地区陆上全球导航卫星系统（Global Navigation Satellite System, GNSS）台站的布设情况。a. 2002年3月31日花莲近海矩震级（Mw）7.1级地震前；b. 2005年慢滑事件（Slow Slip Event, SSE）前；c. 2005年慢滑事件后。文中标注的台站与图3中用于同震滑动及余滑反演的台站一致。
图S2：地震同震偏移与震后位移的GNSS三分量时序序列。图中竖线代表2002年Mw7.1级花莲近海地震的发生时刻。各时序序列中的黑色曲线代表长期运动速率、年周期与半周年周期运动、同震偏移及震后位移。虚线代表地震前经去趋势处理后的GNSS速率。EQ1至EQ3为图1中标注的区域地震。6个GNSS台站的位置已在图3中标注。
图S3：2002年Mw7.1级花莲近海地震俯冲板块界面同震滑动分布的棋盘格测试。合成输入的滑动场以1.0 m的两倍标准差误差生成。所用陆上GNSS台站与图3所示一致。