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1986年11月至1987年1月在山西运城发一次较大震群活动。本文着重讨论了这次震群活动的序列特征和衰减特征
From November 1986 to January 1987, a major earthquake swarm was carried out in Yuncheng, Shanxi. This article focuses on the sequence features and attenuation characteristics of the swarm