The stress drops vary in the range from 0.01 MPa to 10 MPa and are concentrated mainly between 0.1 MPa and 1 MPa, so 1 MPa and more have been taken as high stress drop for evaluating the tectonic stress accumulation in this region.

• 应力降在0.；01兆帕到10兆帕的范围内变化；且主要集中在0