【摘要】 利用江苏区域数字地震台网宽频带地震计记录的Pnl波波形资料,采用TDMT-INV时间域地震矩张量反演方法,尝试反演2009—2011年江苏及附近海域7次中小地震(M_L3.5以上,最大震级M_L5.3)的地震矩张量解,并通过记录清晰的P波初动在震源球的下半球投影对反演结果进行评价。结果表明:反演结果与初动方向一致较好。由此说明在研究区域用矩张量反演法测定中小地震震源机制解具有一定的可行性。更多还原

【Abstract】 The moment tensor solutions of 7 moderate and small size earthquakes(M_L3.5-5.3)which occurred in Jiangsu and its adjacent sea areas from 2009 to 2011 were determined in time domain by using the Pnl waveforms recorded by regional broadband seismometers,based on the method of moment tensor inversion(TDMT_INV).The inversion results were evaluated by the P-wave first motions projected on a lower-hemisphere stereographic focal sphere.The results reveal that the P-wave first motions are quite coincident with the inversion results.Therefore,it is practicable to determine focal mechanism in Jiangsu and its adjacent sea areas by using the method of moment inversion.更多还原