地质学者认为断层是震源在地表的表现。
Geologist thinks that fault is the surface expression of focus.
重新定位结果为利用现今小震的群体特征研究历史大震的震源断层提供了良好的基础资料。
It provides fine foundational ata for the study of focal fault of historical strong earthquakes with the group feature of present small earthquakes.
多震层内震源断层具有区域性特点，不同地区震源断层可能具有不同的孕震机制；
Seismic source faults are characterized by regional variation and may have different earthquake generating mechanisms for different region.
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