多方法计算四川炉霍Ms5.3地震震源深度

Using Three Methods to Study the Focal Depth of the 2011 Ms5.3 Luhuo Earthquake

2011年4月10日四川炉霍发生了Ms5.3地震,为了解不同解算方法对此地震震源深度结果的影响程度,分别采用了CAP波形反演、多台sPn-Pn平均到时差和近震常规定位3种方法求解该次地震的震源深度。结果显示,利用CAP波形反演获得的该地震震源矩心深度约为11 km,采用多台sPn-Pn平均到时差测定的震源初始破裂深度约为12 km,两个结果基本一致,结果应该是可靠的;通过近震常规定位方法计算的震源深度约为18 km,结果的可靠性相对较低;本次地震的震源深度约为11 km,与该区域的优势发震层位比较一致。

The 2011 Ms5.3 Luhuo earthquake occurred in Sichuan Luhuo area on 10 April 2011. In order to under- stand the influence on the result of the earthquake focal depth solution for this earthquake, we use three different methods, the CAP Waveform inversion, the sPn-Pn Average Arriving Time Method of multi - stations and routine locating method, to calculate the earthquake focal depth. The result show that ： 1 ） The focal depth is about 11 km by using the CAP waveform inversion. The focal depth is about 12 km by using the sPn-Pn Average Arriving Time Method of multi-stations. Two focal depths are almost same and the results are reliable. 2） The focal depth about 18 km by using the routine locating method. But its reliability is relatively low. 3 ）This earthquake focal depth is a- bout 11 km according to the construct of the advantages seismogenie layers. So the earthquake focal depth 11 km is better result.