河北省北部地区地震时间序列的最大熵谱分析

THE ANALYSIS OF MAXIMUM ENTROPY SPECTRUM OF TIME SERIES OF EARTHQUAKE IN THE NORTHERN PART OF HEBEI PROVINCE

摘要: 本文根据地震资料,用最大熵谱方法对河北省北部地区历史上M≥5.0级地震以及1970年以来的地震的时间序列进行了分析。结果表明:该地医历史上M≥5.0级地震存在着250年左右的卓越周期;1970年以来的地震序列谱的最大峰值的时间是在31个月时出现的。最后指出,在今后的十几年内,河北省北部地区仍有发生5~6级地震的可能。

Abstract: In this paper based on seismic data,we have analysed the time series for historical earthquakes(Ms≥5) and the earthquakes after 1970 in the north of Hebei Province by maximun entropy spectrum. The results showed that the historical earthquakes (Ms≥5) in this area have outstanding period of 250 years and the term between maximum value of seismic series spectrum since 1970 is 31 months. Finaly this paper indicated that the earthquakes (Ms 5-6) might occur in the north of Hebei Province in the next ten years.