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本文比较了中围大陆近年来发生的浅源强震序列活动及有区域地震台网观测资料和地震现场实地考察结果的强震序列余震性质。认为它们属于晚期强余震的范畴,有以下四个特点:1.发震率不高;2.震中烈度一般偏低;3.地震活动的形态可能与前不同;4.前兆信息量小。 本文还探讨了估测晚期强余震的方法,并讨论了其形成机理。
In this paper, the aftershock properties of strong earthquakes in the mid-mainland China are compared with the sequences of shallow-strong earthquakes in recent years, the observation data of regional seismographs and the field observations of earthquakes. They are considered as belonging to the category of late strong aftershocks. They have the following four characteristics: 1. The incidence of seismology is not high; 2. The intensity of the epicenter is generally low; 3. The shape of seismic activity may be different from the previous ones; 4. The amount of precursor information is small. This paper also discusses the method of estimating late strong aftershocks and discusses its formation mechanism.