摘要:
山西中部由于构造部位特殊,中强地震及弱震活动不但频度高,而且有着特殊的意义。华北历次活跃期中,强震的活动,空间上虽有着迁移规律,但山西中部总是中强地震活动的主要场所。有台网记载以来,山西中部的弱震括动,在其频度的上升时段,同样反映了华北区内强震的活动。
山西地震带上一系列7级以上地震,存在着由北而南和由南而北对迁的现象,山西中部是对迁的中心地区。因此山西中部地区是华北地震活动的一个"敏感区",研究它的地震动态,将有可能提供华北强震活动的信息。
Abstract:
The seismicity in central Shanxi Province are characterized by high freq-uency because of its particularly tectonic sites.Its speciality is described by that moderate strong earthquake occured frequently in this region,althou-gh there is a migration in spatial distribution for strong shocks in the past seismic active period in North China,and by that microseismicities in the zone in the rising frequency period reflect strong earthquake activities in No-rth China from data of network of stations as well.There were migrations of strong earthquakes (Ms≥7)from south to north or in reverse in Shanxi sei-smic zone and the central Shanxi province was a central region of opposite migrations.Finally,it is suggested that the central Shanxi seismic zone is a sensitive area of seismic activity in North China,and the precursor inform-ation of strong earthquake may be obtained by the study of seismicity in this area.
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