These include enhanced emission of infrared (IR) radiation from the earthquake epicentre, as well as anomalies in low-frequency electric and magnetic
包括从地震震中传出来的经过加强的红外辐射，以及不正常的低频电磁现场数据。
Compared with classic wavelet technique, the proposed method can adjust not only the low frequency components of earthquake wave, but also the high frequency components.
和传统的小波分析相比，该方法不仅对地震波低频分量进行精确调整，还可对其高频成分实现类似的调整。
The lack of earthquake curve and frequency curve all showed low value anomalies.
北京地区缺震曲线、频度曲线都出现低值异常。
Acceleration and damage of superstructure under low frequency earthquake was larger than that under high frequency blast earthquake.
与高频爆破地震波相比，低频地震波所产生的结构加速度反应更大，对结构破坏作用更强；
Acceleration and damage of superstructure under low frequency earthquake was larger than that under high frequency blast earthquake.
与高频爆破地震波相比，低频地震波所产生的结构加速度反应更大，对结构破坏作用更强；
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