地震现象

Seismic anisotropy can be studied by four basic seismic wave behaviors, e.g, direction-dependent travel time anomalies, shear-wave birefringence, surface-wave scattering, and direction-dependent conversion of compressional waves to shear waves.

目前人们利用4种基本的地震波现象研究地震各向异性，如横波双折射、面波散射、与传播方向有关的走时异常和PS转换波震相。

The hum can only be detected by seismometers, and exists even when no earthquakes are occurring. Scientists are not yet sure what causes this, but several theories have been offered.

这种哼声只能由地震仪监测到，且在甚至没有地震发生的时候也存在，科学家还不确定是什么导致了这种现象，但已提供了几种理论。

The earthquake produced not only the surface ruptures along the Yingxiu-Beichuan Fault and Guanxian-Jiangyou Fault,but also surface rupture,highway s pavement arching,sand-boils and waterspouts in various degrees in the areas such as Shifang and Mianzhu of the Chengdu plain.

此次地震不但使NE向的映秀-北川断裂和灌县-江油断裂发生了地表破裂，而且，在成都平原区的什邡、绵竹等地也出现了不同程度的地表裂缝、公路拱曲以及带状的喷砂冒水现象。

Some of the examples in her book include the Tang Shan earthquake in China, which occurred on 28 July 1976, and left 650,000 people dead. The catastrophic event was preceded by an airglow, said to have been caused by Soviet ELF wave experiments to heat the ionosphere.

在其书中举出了一些例子，其中包括1976年7月28号发生的中国唐山大地震，剥夺了六十五万人的生命，但在这灾难发生之前有大气辉光现象，据说是苏联极低频电磁波试验加热电离层导致了这一惨烈的灾难发生。

Our result suggests that the very low Pn velocity beneath the southcentral Tien Shan is caused by high temperatures produced by heating from mantle upwelling, and that this heat has been conducted up into the crust, inducing a ductile rheology that prevents significant seismic activity.

这一现象说明地幔上涌引起高温极大地降低了岩石层地幔的强度，并以热传导的方式进入地壳使其失去地震破裂强度而发生韧性变形。

For example, the 1964 Niigata earthquake caused widespread liquefaction in Niigata, Japan which destroyed many buildings.

例如，1964年日本的Niigata地震引起了大面积的液化现象，毁坏了许多建筑。

For example, the 1964 Niigata earthquake caused widespread liquefaction in Niigata, Japan which destroyed many buildings.

例如1964年新鸿地震在日本新鸿地区造成广泛的液化现象破坏了很多建筑物。

For example, the 1964 Niigata earthquake caused widespread liquefaction in Niigata, Japan which destroyed many buildings.

例如1964年日本新鸿地震的广泛液化现象，造成新鸿地区建筑物的大部分毁损。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。