使用ISOLA波形反演方法，对2010年1月15日濮阳4.2级地震的震源机制进行研究，结果显示，此次地震的震源参数为：节面A：走向63°，倾角89°滑动角134°；节面B：走向153°，倾角44°，滑动角1°；标量地震矩1.0×10¹⁵ N·m，震源深度5km。研究发现，由于使用了相对简化的速度模型，波形拟合程度随着震中距的增加而逐渐变差。

A moderate-size earthquake (M_L4.2) occurred at Puyang city, near the boundary of Shandong and Henan province, on 15 January 2010. This paper estimates the focal mechanism for this earthquake by using ISOLA waveform inversion method. Fault parameters retrieved by this study are list below: node plane A: strike 63°, dip 89°, rake 134°; plane B, strike 153°, dip 44°, rake 1°; scalar moment 1.0×1015 N•m, focal depth 5km. The results also imply that waveform fitness become worse with increasing of epicentral distance because of the simplified velocity models.