There are some unusual intensity points or areas. The direction of the isointensity distribution of the earthquake was consistent with the Cenozoic Era downfaulting basin and the boundary faults control- ling the basin to develop.

• 烈度值分布具有不均匀性特征,出现烈度异常点和异常区,这次地震极震区等烈度线分布的方向和范围,与北西向新生代断陷盆地及控制盆地发育的边界断裂十分一致。