Fig. 4
The first shear strain rate (colored contours) and the principal strain rate (black arrows) field of the Western Chinese mainland, (a) the first shear strain rate and the principal strain rate field of the 1999–2001 period; (b) the first shear strain rate and the principal strain rate field of the 1999–2007 period, the focal mechanism solutions of No.1, No.4, No.6, No.7, and No.8 correspond to the West Kunlun Mountain Pass M 8.1 earthquake, the Yushu M 7.1 earthquake, the Yutian M 7.3 earthquake in 2014, the Jiuzhaigou M 7.0 earthquake, and the Maduo M 7.4 earthquake, respectively. The figure was created using GMT 6 (Generic Mapping Tools) software6.
