Why is prediction so difficult? This question cannot be answered conclusively, as we do not yet have a definitive theory of the seismic source.
为什么地震预测那么困难？对这个问题不能做出最后的答复，因为我们至今没有对地震成因的一个确定的理论。
MACHA system is one of the most advanced seismic source synchronous system.
Macha系统是世界上最先进的震源同步系统之一。
When shocked by strong stress, the medium near seismic source shows plastic property instead of elastic property.
在近震源的条件下，介质受大应力作用时表现出塑性性质而不是弹性性质。
A cage, or a steel enclosure surrounding a seismic source, can be used to dissipate energy and reduce the bubble effect.
也可以把震源放入笼子或钢栏中使能量发散，减少气泡效应。
These results will give new quantitative data for geodynamics and has practical meaning for seismic source tomography research.
这些结果将为地球动力学研究提供新的定量资料，对于震源层析成像研究等有实际意义。
Through seismic wave analysis it is inferred that the Hualian quake was probably caused by double offsets in the seismic source.
由地震波分析推测这次地震可能是由于震源的两次错动引起的。
The inversion of heterogeneous characteristics of seismic source is an important field in strong earthquake seismology at present.
利用地震记录反演震源非均匀特征是目前强震地震学研究中的一个重要的课题。
The main characteristics of seismic source function in underground explosion are studied by seismological method and numerical method.
结合地震反演方法和数值计算方法，研究了地下爆炸震源函数的特征以及介质特性对震源函数的影响。
Experiments in Tangshan area demonstrated that PHV works efficiently and stable, and has advantages over other non-explosive seismic source.
PHV在唐山地区的实验结果证明它能够稳定、有效的工作，而且优于其它非爆炸性震源。
It is necessary to carry out filtering before we determine the position of seismic source, and the exciting time, and strength of seismic signal.
在确定震源的位置、发震时刻和震源强度之前必须进行滤波处理。
Harmonic distortion arises from the nonlinear vibrations of mechanical device of seismic source and the coupling between the vibrator and the ground.
由于震源的机械装置和振动装置的非线性振动以及振板与大地的耦合等问题，在震源向地下输入能量的同时，也产生了谐波畸变。
The relationships between parameters of the rupture starting point in the seismic source and moment magnitude for three fault types were also derived.
同时也建立了不同断层类型的地震破裂初始点位置参数与矩震级之间的关系式。
Based on the study of regional seismic environment and seismic periodicity, the potential seismic source zones and their activity parameters are determined.
本文在研究秦皇岛市区域地震地质环境和地震活动规律的基础上，确定了区域潜在震源区及相应的地震活动性参数。
Finally, the formulas of PGA and RMS accelerations attenuation dependent on the rupture direction of the seismic source are presented for the Western United States.
文章最后给出了美国西部考虑震源破裂方向的地震动峰值加速度和均方根加速度的衰减关系。
In addition, the influences of various parameters of the recurrence model on the results cf hazard analysis have been primarily discussed in a case of one seismic source.
此外，文中还对一个震源的情况初步探讨了发震模型中的各种参数对地震危险性分析结果的影响。
In this paper, we deducted the transform relation between seismic source parameters from seismic fault plane solution in double couple point source model and from the seismic moment.
文中推导了双力偶点源模型震源机制解得出的震源参数和用地震矩张量反演得出的震源参数之间的转换关系。
Using this model and the seismic source parameters obtained by source mechanism studies, the authors computed the theoretical distributions of earthquake intensity for four typical earthquakes.
用此模型和震源机制工作给出的震源参数，计算了四个典型地震的理论烈度分布。
The high resolution seismic prospecting system for marine shallow formations, designed by us, consists of seismic source, isofloating cable receiving subsystem, recording unit and data processing set.
我们设计的海上浅层高分辨率地震勘探系统包括震源、等浮电缆接收系统、记录系统及资料处理四个部分。
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；
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；
应用推荐