The trace monitoring and comparative analysis of precursory anomaly is of great significance in seismic regime prediction.

前兆异常的跟踪监测与对比分析，在震情预测中有重要作用。

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It is very important to identify and trace the evolution of such combination of small earthquake in short-term and imminent earthquake prediction.

识别、跟踪和把握这种小震组合及其演变对于提高地震短临预测很有价值。

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This makes geochemical prospecting turn from the study of seeping "trace" and halo anomalies of hydrocarbons in near surface to a direct research and prediction of the target distribution.

使油气化探工作从近地表研究油气渗逸“痕迹”和晕圈异常进而预测目的层在平面上的位置转向直接对目的层进行研究和预测。

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