After the Tangshan earthquake of 1976, strain adjustment took place in the earthquake source region by the occurrence of a series of aftershocks.
1976年唐山地震后，随着一系列余震的发生，震源区进行应变调整。
The largest earthquake worldwide during the past 200 years (magnitude 9.5 in May 1960) had a source region approximately 230 kilometers (140 miles) north of the February 27 quake.
在过去两百年中最大的地震（1960年5月9.5级地震）大约发生在此次2月27日地震以北230公里（140英里）处。
Seismic source faults are characterized by regional variation and may have different earthquake generating mechanisms for different region.
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；
The research results show that several significant shocks happened in source region and its vicinity before a large earthquake are easily triggered by certain directions.
研究表明，大地震前震源区及其附近发生的几次显著地震易受固体潮引潮力某个方位附近触发。
The formulas and the directions of the forces acted on the ends of the fault in earthquake source located in the tension region distributed radially have been derived theoretically.
从理论上计算了位于径向分布的张力区中孕震断层端部所受力的表达式和方向。
The formulas and the directions of the forces acted on the ends of the fault in earthquake source located in the tension region distributed radially have been derived theoretically.
从理论上计算了位于径向分布的张力区中孕震断层端部所受力的表达式和方向。
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