By analyzing the early phase of frequency decay, it is possible to identify multi-shock earthquake sequence, but it is difficult to rapidly judge intermittent double-shock and swarm.
分析地震序列前期的时频度衰减曲线有可能区分出多震型地震，但快速区分间歇双震型和震群型地震较为困难。
Signal shock and precursory earthquake swarm and foreshock activities always accompany the anomalous space-time patterns of seismic 'ty.
信号震、前兆震群和前震(包括早期前震)的确定应考虑到异常的地震活动时空图象。
Abnormal time and shape of earthquakes with magnitude of 5, 6 and 7 (or earthquake swarm of m 6) are different and have respective features.
且在异常时间、异常形态上，5级、6级和7级地震(或6级震群)各有其特点和差异。
The existing of earthquake swarm, S wave shadow in some seismic stations and gradually uplifting of surface suggest a magma system beneath these volcanoes.
火山区存在的震群活动、部分台站观测到的S波阴影区以及地表的缓慢抬升等，指示火山区存在一个岩浆系统。
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。
Lastly, a brief account has been given on a non-strong earthquake prediction made in the light of swarm characteristics during the time, and on its satisfactory social and economic results afterward.
最后，简要叙述了震群发生过程中根据震群特征作出的无强震预报，及由此得到的良好社会经济效果。
Lastly, a brief account has been given on a non-strong earthquake prediction made in the light of swarm characteristics during the time, and on its satisfactory social and economic results afterward.
最后，简要叙述了震群发生过程中根据震群特征作出的无强震预报，及由此得到的良好社会经济效果。
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