【摘要】 本文对燕山地震带近30年来的地震活动参数E、N、E^1/2和b值进行了系统的分析。发现该带在此期间内发生的两次Ms≥5.5级地震前,上述参数都出现了明显的异常变化。故以这些地震活动的异常特征为依据对燕山带未来地震趋势作一估计。更多还原

【Abstract】 This paper systematically analyzed the seismicity parameters, E, N, E and b values in almost 30 years in the Yanshan seismic zone. The authors- found that before two earthquakes with Ms ≥ 5.5 occurred in this period in this zone, the above parameters had obvious anomalous variation. Therefore, the tendency of the future earthquakes in Yanshan zone are estimated based on the anomalous features of seismic activities.更多还原