2014年2月12日于田Mw6.9地震破裂过程初步反演：兼论震源机制对地震破裂过程反演的影响

Fast inversion for the rupture process of the 12 February 2014 Yutian M_W6.9 earthquake:Discussion on the impacts of focal mechanisms on rupture process inversions

通过反演2014年2月12日新疆于田MW6.9地震的远震波形记录,比较和分析了各种断层面倾角的破裂过程模型,于震后2.2小时确定并发布了这次地震的破裂过程结果,并讨论了震源机制不确定性对破裂过程反演的影响.根据所确定的破裂模型可知,2014年于田MW6.9地震的滑动量分布比较集中,具有朝西南延伸的优势破裂方向的特征.这一特征与该地震的余震分布具有较好的一致性.

The rupture process of the 12 February 2014 Yutian, Xinjiang, Mw6.9 earthquake was fast estimated about 2.2 hours after the earthquake occurrence by inverting teleseismic data and comparatively analyzing various rupture mod- els of different dip angles. The impacts of the focal mechanisms on the rupture model were also discussed. From the final determined model, the fault slip of the 2014 Yutian Mw6.9 earthquake is concentrately distributed but still showsdominant rupture direction toward the SW, which is in good agreement with the spatial distribution of the aftershocks.