It was analyzed that seismicity background, earthquake sequence, seismicity pattern of moderate-small earthquake around epicenter and seismology parameter of Beihuanghai M_L5.1 earthquake in 2003.
对2003年北黄海5.1级地震的地震活动背景、地震序列、震中周围中小地震活动图像及地震学参数等进行了详细分析。
The results show that the swarm region and its nearby of the modulating small earthquake and dynamic small earthquakes maybe the dangerous region of moderate earthquakes in the near future.
结果表明，调制小震密集区及边缘和受中强震触发引起长程关联活动的动态小震密集区及边缘，有可能是近期中强震的危险区。
Moreover, most aftershocks of strong earthquake are small and moderate events, which provide important information on focal mechanism of mainshock.
此外，强震的余震多为中小地震，大量中小余震可为主震发震机理研究提供重要信息。
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