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本文给出1988年2月25日彰武地区Ms:4.8级地震的震源机制解,并对发震断层的走向和有关参数作了分析和估算。认为北东22°节面为断层面,破裂长度为5千米左右,破裂速度为3.2 km/秒,平均错距为5 cm,平均应力降为9×10~5帕,同时,对彰武地震无前、余震的孕震模式进行了初步探讨、彰武地震前的小震活动特征作了分析。最后,对彰武地震后的震情趋势作了讨论,认为彰武地震后,1988年～1989年内,辽宁省及其附近地区发生5～6级地震的可能性很大。
In this paper, the focal mechanism solution of Ms = 4.8 earthquake in Zhangwu area on February 25, 1988 is given and the trend and relevant parameters of the seismogenic fault are analyzed and estimated. It is considered that the northeast 22 ° nodal plane is fault plane, the rupture length is about 5 km, the rupture speed is 3.2 km / s, the average misalignment is 5 cm and the average stress drop is 9 × 10 ~ 5 Pa. Earthquake without precedent and aftershock earthquake patterns were preliminarily discussed, the characteristics of small earthquakes before the Zhangwu earthquake were analyzed. Finally, the earthquake tendency after the earthquake in Zhangwu was discussed. It is considered that there is a high possibility that earthquakes of magnitude 5 to 6 occurred in Liaoning Province and its vicinity from 1988 to 1989 after the Zhangwu earthquake.