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本文通过对(1970年～1985年)红山地震台所记录的台站周围地震资料的分析,发现较大地震前的小震大多呈现一种异常波形。我们对这种波形的特征进行了分析,并从统计的角度探索了它作为强余震前兆信息的可能性。结果表明,异常小震的震中与未来较大余震的震中相近;异常地震与强余震之间的时间间隔在数分钟至几天之间,异常小震的震级与未来较大地震的震级无明显的对应关系。最后,对产生这种波形的可能机制从震源区介质。应力场方面作了初浅的讨论。
Based on the analysis of the seismic data recorded around the station recorded by Hongshan Seismic Station (from 1970 to 1985), it is found that the small earthquakes before the large earthquakes mostly show anomalous waveforms. We analyzed the characteristics of this waveform and explored its potential as a precursor to strong aftershocks from a statistical point of view. The results show that the epicenter of the anomalous small earthquakes is similar to the epicenter of the larger aftershock in the future; the time interval between the anomalous earthquakes and the strong aftershocks is between several minutes and several days, and the magnitudes of the anomalous small earthquakes and the future larger earthquakes are not obvious The corresponding relationship. Finally, the possible mechanism for generating this waveform from the source zone media. Stress field made a shallow discussion.