历史上和现今发生了许多破坏性大地震和众多中小地震。
There happen many destructive earthquakes and a lot of mid? Small earthquakes in history and now? Days.
较详细地讨论了确定中小地震破裂面方向和环境应力值方法的误差。
The errors of determining direction of fracture plane and environment stress of moderate and small earthquakes are analyzed in detail.
先发大震可以激发后继大震孕育区内发生一系列中小地震——前兆地震。
The preceding great earthquake can probably trigger a series of moderate and small earthquakes----the precursory earthquakes in the consequently great earthquake generating area.
此外，强震的余震多为中小地震，大量中小余震可为主震发震机理研究提供重要信息。
Moreover, most aftershocks of strong earthquake are small and moderate events, which provide important information on focal mechanism of mainshock.
综合分析中小地震活动和前兆异常群体演化特征，对于判定中期地震危险区是十分重要的。
It is helpful for judging the emphatic area of medium term earthquake risk by synthetical analysis of seismic activity and the features of precursory anomaly evolution in group.
订正海平面还能检出与中小地震有关的形变前的信息，文中并举出预测前兆形变成功的实例。
They appear to be significant fod medium-term prediction of larg earthquakes and also give precursory information before moderate and small earthquakes...
订正海平面还能检出与中小地震有关的形变前的信息，文中并举出预测前兆形变成功的实例。
They appear to be significant fod medium-term prediction of larg earthquakes and also give precursory information before moderate and small earthquakes. This paper gives s...
大家知道，在同一地区，用中小地震确定的传播路径影响和软基岩场地效应，同样适用于强震。
It is usually accepted that the path effect and the soft rock site effect determined from small-moderate earthquakes are fit for strong earthquakes in the same region.
采用网格搜索方法，利用区域地震三分量全波形资料，对中小地震震源机制的反演方法进行了研究。
A source mechanism inversion technique for middle and small earthquakes was studied by using complete regional waveforms of all three components.
但这种关系不能简单的外推到中小地震中，即使对于同一震级范围，上述参数也还存在着区域性的差异。
Such relationship can not be briefly extrapolated to intermediate and small earthquakes, even though in the same magnitude range, there still exists the regional differences in parameters.
通过分析中小地震深度分布特征的原因，结合强震发生的条件和特性，对中小地震前兆机理进行了解释。
We analyzed the cause of focal depth distribution and explained the precursory mechanism of small and moderate earthquakes with occurrent condition and characteristics of strong earthquakes.
中小地震的震源谱可以用“布龙”理论模型表示，传播路径中的几何衰减因子可以用三段几何衰减模型表示。
The source spectrum of small-moderate earthquake can be represented by theoretical "Brune" model, the geometric attenuation factor of whole path can be represented by three-segment geometric model.
通过对腾冲火山区强震和中小地震震源机制解分析，对火山区构造应力场方向空间分布，以及震源类型和破裂特征作了研究。
Through focal mechanism analyses of mid small earthquakes occurred in Tengchong volcano areas, the spatial distribution of tectonic stress field, focal types and fracture types have been studied.
对2003年北黄海5.1级地震的地震活动背景、地震序列、震中周围中小地震活动图像及地震学参数等进行了详细分析。
It was analyzed that seismicity background, earthquake sequence, seismicity pattern of moderate-small earthquake around epicenter and seismology parameter of Beihuanghai M_L5.1 earthquake in 2003.
本文提出的方法较易掌握，可以作为工程场地和中小城市地震影响小区划中确定设计反应谱的简化方法。
The method is easy to master, and then, can be used for the definition of design spectra in the seismic microzonation small or moderate cities, and in the site evaluation of engineering projects.
在常规地震资料处理中小断层所产生的局部反射振幅异常，常被各种因素所掩盖，无法识别小断层。
During normal seismic material processing, the local reflected amplitude abnormality caused by small faults are so covered by all kinds of factors that the small faults can't be identified.
在频率-波数域中，详细地推导出了对地震记录进行三维偏移归位的全部计算公式，并给出了能在中小型计算机上实施的程序结构和流程。
Formulas for 3d migration of seismic data in frequency-wave number domain are derived. The software and procedure used on medium -sized computer and minicomputer are given.
在频率-波数域中，详细地推导出了对地震记录进行三维偏移归位的全部计算公式，并给出了能在中小型计算机上实施的程序结构和流程。
Formulas for 3d migration of seismic data in frequency-wave number domain are derived. The software and procedure used on medium -sized computer and minicomputer are given.
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