Seismic simulation is an effective way to reveal the characters of wavefields, records and the medium. While most of them simulate wave propagation with explosive source, which is a kind of simple source. The condition of fracturing is more complicated and with more kinds of focal mechanisms. Here, we demonstrate a method to add different sources by modifying predecessor’s equation and analyzing the differences between ISO, DC and CLVD on wavefields and records. The method is to combine the seismic moment tensor theory raised by Aki and Richard with staggered-grid finite difference method. The equations of sources adding and difference schemes are listed in paper. Through the results of forwarding, the characters of focal mechanisms are shown up in Vx component. These conclusions may be useful to distinguish the type of fracture in actual data. It will be helpful to gain insight into understanding the process of fracturing.


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