Their house, which was solidly built, resisted the main shock.
他们的房子修建得很坚固，经受住了主震。
It can happen with a month, or within days, from the main shock.
余震可以在主震发生后的一个月或者几天之内发生。
Within an hour after the main shock, two aftershocks, one of magnitude 5.0 and the other 5.2, occurred.
主震后不到一个小时的时间里，又发生了两次余震，一次5.0级，一次5.2级。
The NNE-SSW distributed aftershocks occurred on, or near, the fault plane of the main shock;
北北东—南南西向分布的余震发生在主震的断层面上（或其附近）；
This result has a certain reference value for forecasting of main shock and the maximum aftershock.
该结果对主震和最大余震的预测具有一定的参考价值。
The main shock occurred on the dextral obduction-type fault zone and the hypocenter depth was about 15km .
汶川地震的主震发生在具有右旋性质的仰冲型断层带上，震源深度为15公里左右。
This paper discusses the intensity of the earthquake sequences, which include the foreshock, main shock and aftershock.
本文讨论了地震序列中前震、主震和余震的烈度。
After the main shock, most of the stresses have been released, so the aftershock sequences show a rupture process of lower stresses.
主震后，由于释放了绝大部分应力，余震序列则表现为低应力破裂过程。
As a general rule, aftershocks represent minor readjustments along the portion of a fault that slipped at the time of the main shock.
一般来说余震代表发生主震的断层的微小重调。余震的发生频率随着时间慢慢减小。
The results show that the group of nodal planes of pre shocks puts together comparably and identical with the fault of main shock, so do their P axes.
结果表明，前震的一组节面比较集中且与主震断层面大体一致，其主压应力轴也表现出相对的集中。
The migration phenomena reveal a process that the seismicity in both the far-field and the near-field becomes intensive and quiet alternatively before a main shock.
这种迁移现象反映出大震前远震源区和近震源区内地震活动交替活跃和平静的过程。
In different phases of the earthquake process, effects of the dynamic dam-foundation interaction are different. The interaction is rather prominent in the main shock phase.
坝体-坝基动力相互作用在地震过程中的不同阶段表现有所不同，主震阶段的相互作用显著。
From this, it has been inferred that the strike of the dislocating fault plane of the main shock is NWW. It seems to be a left lateral horizontal slip fault with high dipping Angle.
由此推测，主震的错动面为北西西走向，可能是高倾角的左旋平移断层的滑动结果。
The largest aftershocks of an earthquake over the years around the world we've observed tend to be about one magnitude unit less than the main shock, more likely within months, but it could be years.
我们所观测到的世界上地震发生后强度最大的余震通常要比主震小一级，一般是在几个月内发生，但也可能是在几年后。
We use 78 focal mechanisms of the fore shocks, main-shock and after shocks of the Yao 'an earthquake sequence to analyze the characteristics of focal fault and stress field.
用姚安地震序列前震、主震和余震的78个震源机制解，分析了序列震源断层和震源应力场特征。
The stress at station YUS increased after the main-shock, and with the stress release caused by the aftershocks, the stress reduced in the late stage.
YUS台附近的地壳应力在主震后得到了增强，随着余震活动导致的应力释放，后期应力减小。
The stress at station YUS increased after the main-shock, and with the stress release caused by the aftershocks, the stress reduced in the late stage.
YUS台附近的地壳应力在主震后得到了增强，随着余震活动导致的应力释放，后期应力减小。
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