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运用地震破裂过程快速反演方法,在2010年2月27日智利地震发生后,采用全球地震台网(GSN)的宽频带地震资料,反演了这次地震的破裂过程,在震后约3.5小时得到了这次地震破裂过程的反演结果.结果表明,这次智利地震的破裂过程具有如下基本特征:①矩震级为MW8.6;②地震破裂持续时间约为150s;③包括4个滑动量集中分布区域,最大滑动量约为8m,最大滑动速率约为0.8m/s;④这次地震总体上是一次不对称的双侧破裂事件,破裂从破裂起始点(震源)开始,同时向南北两个方向扩展,但以向北扩展的破裂为主.
Using the fast inversion method of seismic rupture, the broadband seismic data of the Global Seismic Network (GSN) was used to retrieve the rupture process of the earthquake after the Chilean earthquake on February 27, 2010, and after the earthquake about 3.5 The results show that the rupture process of the Chilean earthquake has the following basic features: (1) the moment magnitude is MW8.6; (2) the duration of the earthquake rupture is about 150s; The maximum slip is about 8m and the maximum slip rate is about 0.8m / s. (4) The earthquake is generally an asymmetrical bilateral rupture event. The rupture starts from the rupture point (source) South and North expansion in both directions, but to expand the north-based rupture.