Comparison on Characteristics of Strong Ground Motion from Two Earthquakes with Similar MW: the Baja, oft-com:office:smarttags" />Mexico, MW7.2 and Yushu, China, MW6.9 Earthquake in 2010
摘要
In this paper, two special finite fault models with the same size in fault length and width are constructed to simulate the near-fault strong ground motions for comparison study of Yushu earthquake 2001 and Baja earthquake. The fault slip distributions on both faults are generated based on a dynamical composite source model, in which the subevent-source-function is described by Brune’s pulse. The result shows that the near-field peak ground accelerations (PGAs) and peak ground velocities (PGVs) on bed rocks from Yushu event are almost twice as that from Baja event. Moreover, if the shallow velocity structures are considered in the strong motion simulation, the resultant PGAs and PGVs from Yushu event are also twice as that from Baja event.