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seismological evidence
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  “seismological evidence”译为未确定词的双语例句
     Seismological evidence of seismogenic fault of the M 7.3 Taiwan Strait earthquake
     1994年台湾海峡7.3级地震发震断层的地震学证据
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     Seismological evidence for active block boundary in China′s continent
     中国大陆活动地块边界的地震学证据
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     Seismological evidence for differential rotation of the Earth's inner core
     地球内核旋转不同的地震学证据
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     Seismological evidence of the crust flowing under the eastern boundary part of Qinghai-Tibet Plateau
     青藏高原东缘下地壳流动的地震学证据
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     The experiences obtained from studies of historical large earthguakes in China indicate that small tremors take place prior to big shocks,and this is the,seismological evidence for the masses to seek shelter immediately prior to a large earthquake.
     对我国历史上大震研究的经验表明,大振动前刻有小动,这是群众临震急避的地震学依据。
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  相似匹配句对
     Seismological evidence for differential rotation of the Earth's inner core
     地球内核旋转不同的地震学证据
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     On Electronic Evidence
     电子证据可采论
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     EVIDENCE OBTAINING
     谈谈仲裁案件中的证据收集
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     Seismological evidence for active block boundary in China′s continent
     中国大陆活动地块边界的地震学证据
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     SEISMOLOGICAL RESEARCH IN AUSTRALIA
     澳大利亚的地震研究
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  seismological evidence
Seismological Evidence of Active Faulting in the Tendaho Rift (Afar Triangle, Ethiopia)
      
We present seismological evidence in favour of the latter concept.
      
Geological and seismological evidence of increased explosivity during the 1986 eruptions of Pavlof volcano, Alaska
      
We have seismological evidence that the MS upheaval is not a cryptodome.
      
Similarly, seismological evidence for ULVZs does not require a sedimentary layer, although these data can be explained by such a layer.
      
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Although there seem to be many earthquake precnrsors,sudden occurrences of moderate and small earthquakes and sudden quiescence phenomena after their concentration can be mainly used at present in the decision making for short-imminent earthquake prediction.The attenuation features of earthquake sequences should he taken into consideration for predicting strong aftershocks.The static seismic hazards can be forecasted on the hasis of the response characteristics of the soil,depth of ground water table and topography...

Although there seem to be many earthquake precnrsors,sudden occurrences of moderate and small earthquakes and sudden quiescence phenomena after their concentration can be mainly used at present in the decision making for short-imminent earthquake prediction.The attenuation features of earthquake sequences should he taken into consideration for predicting strong aftershocks.The static seismic hazards can be forecasted on the hasis of the response characteristics of the soil,depth of ground water table and topography etc.to ground shaking;the dynamic seismic hazards can be forecasted based on various precursors such as rise or fall of ground water Ievel,fault creeping,foreshocks,meteorological factors and so on.The experiences obtained from studies of historical large earthguakes in China indicate that small tremors take place prior to big shocks,and this is the,seismological evidence for the masses to seek shelter immediately prior to a large earthquake.The rapid determination of epicenters.magnitude and meizoseismal distribution of a large shock immediately after it occurrs is the key to rapid and best deployment of relief material and personael.The prompt identification of the meizoseismal distribution can be made by using the methods of seismo-geology, historical carthquake examples,precursory field,focal mechanism and direct reconnaissance and so on.In case,a large earthquake occurrs in a deeper offshore region,whether or not a tsunami will he caused therefrom could be judged from the ratio of the SV and components of the transverse waves and the ratio of amplitudes of two surface waves.The internal organs of the human body may easily get into resonance with the major values of the acceleration spectrum of earthquake waves;this fact should be taken into account when considering medical countermeasores.The methods of statistics,heat comduction and fault slip rate can be applied for estimating the intensity of future earthquakes in post-earthquake rehabilitation work.

地震学前兆虽然很多,但今日能用于短临预报决策的主要是中小地震的突然活跃以及密集后的突然平静现象。对于强余震的预报还要考虑到地震序列的衰减特征。静态震害预测基于土质、地下水深浅和地形等对振动的响应特征;动态震害预测基于前兆所反映的水位升降、断层蠕滑、前震和气象因素等。对我国历史上大震研究的经验表明,大振动前刻有小动,这是群众临震急避的地震学依据。大震发生后即迅速定出震中、震级和极震区分布是快速救灾和最佳部署物资和人力的关键。对于极震区分布的速判可用地震地质、史例、前兆场、震源机制和直接侦察等方法。如大震发生于较深的近海地区,则用横波 SV 和 SH 分量之比以及两种面波振幅之比判断有无海啸。地震波加速度谱中的较大值与人的胸部内脏易于共振,这是医疗对策方面要考虑的。在重建家园方面,可利用统计法、热传导法和断层滑动速率法确定抗震烈度。

This paper gives a review of the research situation on the three dimensional velocity images and the main results obtained in the range of global scale, large scale as well as regional scale.In consideration of the relation between three dimensional velocity images and other field of Earth Sciences, the author suggests that it is a long target providing direct seismological evidence for some fundamental problems such as plate tectonics and dynamics of the Earth. With the purpose of this auther offers also...

This paper gives a review of the research situation on the three dimensional velocity images and the main results obtained in the range of global scale, large scale as well as regional scale.In consideration of the relation between three dimensional velocity images and other field of Earth Sciences, the author suggests that it is a long target providing direct seismological evidence for some fundamental problems such as plate tectonics and dynamics of the Earth. With the purpose of this auther offers also three problems to solve and some reference choice projects.

本文评述了三维速度图像研究的现状,简要地叙述了在全球尺度、大尺度和区域尺度内三维速度图像重建所取得的主要成果.笔者在介绍了三维速度图像同地球科学其它领域的关系之后,在对未来的展望中认为,为板块构造和地球动力学这样一些基本的地学问题提供直接的地震学的证据将是一个长期的目标,并为此提出了三个要解决的问题,还针对我国现有条件提出了供选择的参考课题.

For 70 years,it has been known that earthquakes occur to depths of hundreds ofkilometers in the earth ,where the pressure and temperature make conventional brittle shearfracture impossible. Earthquake frequency of occurrence decreases rapidly with depth for about300 km,but then rises again,only to peak at about 600 km and then drop to zero by 700 km.The deeper population now appears to be attributable to a new instability that we discoveredfive years ago. The new faulting process is triggered when a phase transformation...

For 70 years,it has been known that earthquakes occur to depths of hundreds ofkilometers in the earth ,where the pressure and temperature make conventional brittle shearfracture impossible. Earthquake frequency of occurrence decreases rapidly with depth for about300 km,but then rises again,only to peak at about 600 km and then drop to zero by 700 km.The deeper population now appears to be attributable to a new instability that we discoveredfive years ago. The new faulting process is triggered when a phase transformation takes place inthe mineral olivine,(Mg,Fe)_2SiO_4 ,the most abundant mineral in the uppermost 400 km of theearth.We discovered this new faulting mechanism and have extensively investigated it in thechemical system Mg_2GeO_4(which undergoes the olivine→ spinel transformation at pressuresmuch lower than does silicate olivine)and confirmed it in olivine of mantle composition at veryhigh pressure. The new mechanism is self-organizing like brittle failure,it emits seismic energyduring fauIt growth only,and fault slip takes place in a “ superplastic”layer of extremely fine-grained spinel that is manufactured in microanticracks. Faulting by this mechanism is possibleonly during exothermic reactions, thereby providing an explanation for why earthquakes stop at700 km where an endothermic phase change takes place from the spinel form of olivine to thestill-denser minerals of the lower mantle. Seismological evidence from deep earthquakes is con-sistent with this new mechanism.

70年代以来,人们已经知道在地球几百公里处有深源地震存在,在这个深处压力和温度不可能使岩石产生脆性剪切断裂。在300km之下,地震出现频率随深度增加而迅速减少,但是在600km处又再次增加,在700km处深源地震停止。五年之前,我们发现这种深源地震与一种新的塑性不稳定性有关。在地球400km处,当上地幔最主要矿物橄榄石(Mg,Fe)_2SiO_4发生相变时会导致一种新的断层类型产生。我们首先利用锗橄榄石Mg_2GeO_4,(即晶体结构与镁铁橄榄石相同,而化学成分有所不同,它可以在比较低压力条件下发生相变)进行模拟实验,借以证明在上地幔很高压力条件下橄榄石也会发生相变。这种新的机制叫自组织类的脆性断裂(self─organizinglikebritlefailure),其特征是:在断层生长过程中会释发地震能量;在由很细尖晶石颗粒组成的“超塑性层”中会发生断层滑移(即所谓显微反向断裂,microanticrack)。由这种机制形成的断层只在放热反应过程中产生,它可以用来解释为什么深源地震停止于700km,因为在这个深度,橄榄石到尖晶石相变为下地幔高密度矿物的吸热反应。深源地震的地震学证据与这种新机制是一致的。

 
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