用地震能量释放的方位特征分析唐山地震前后的应力场

ANALYSING STRESS FIELD BEFORE AND AFTER TANGSHAN EARTHQUAKE WITH AZIMUTHAL FEATURE RELEASING SEISMIC ENERGY

用地震能量释放的方位特征分析了唐山地震前后的应力方向及有关应力参数的特点及其变化。结果表明,实际资料的统计图和理论上的预计符合较好,唐山地震前后应力方向及有关应力参数存在明显差异和有规律的变化趋势。这可能为地震发生机制的研究和强震预报提供了一些有益的参考。

The stress orientation and relative stress parameter before and after Tangshan earthguake have been analyzed by meanse of azimuthal feature releasing seismic energy in this paper. The results show that statistic pictures obtained from actual data coincide better with theoretical prediction. There exist obvious difference and regular variational tendency relating to stress orientation and parameter before and after Tangshan earthuake.