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从小震活动的时空分布以及测震学参数的变化出发,分析了苍山地震前地震活动的异常特征。研究结果表明,苍山5.2级地震前出现了地震活动图像和几种中、短期测震学参数异常,但无明显短临信息的前震活动。
Based on the spatiotemporal distribution of small earthquakes and the change of seismological parameters, the anomalous features of the seismic activity before the Cangshan earthquake are analyzed. The results show that before the Cangshan M 5.2 Earthquake, seismicity images and several kinds of medium-short term seismological parameters were anomalous, but there was no obvious short-term and short-range information of foreshock activity.