地震系列属震群型。
另外一个震群于二月末三月初发生在都江堰和彭州之间。
Then there was another swarm at the end of February and early March between Dujiangyan and Pengzhou.
初步认为荣成震群是一次频发性震群，不是前兆震群。
It is suggested that the swarm might occur frequently and was not a precursory one.
其他许多中国的大地震象海城地震一样，也有类似的前兆震群。
Many other violent earthquakes sofar occurred in China, similar to the Haicheng earthquake, also had precursory earthquake swarms.
地震记录的频谱分析表明，该震群为典型的火山构造类型地震。
The spectrum analysis shows that the earthquakes are typically volcanic tectonic earthquakes.
而对一些小震群的研究得到震群地震尾波率衰减变化不大的初浅印象。
Study of a number of small seismic swarms also gives us the preliminary understanding that the attenuation rate of seismic coda waves of swarms does not change considerably.
本文将率先发震的邢台震群与大同地震进行对比。发现多种相同之处。
In this paper, after making the comparison between the Xingtai swarm first occurred and the Datong earthquake, it is found that they are same in many aspects.
它由三步组成：余震和震群的剔除，相对完全性的识别以及绝对完全性的计算。
It consists of three steps: removal of aftershock and swarm, detection of the relative completeness and evaluation of the absolute completeness.
应用主成分分析方法构建了前兆震群判别方程，对震群活动的异常特征进行了分析。
The anomalous characteristic of the swarm activity is analyzed using the precursor swarm distinguishing equation constructed by the principal component analysis method.
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。
Signal shock and precursory earthquake swarm and foreshock activities always accompany the anomalous space-time patterns of seismic 'ty.
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。
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.
根据伽师震群地震的2 1 77个P波初动方向记录，计算了伽师震群的平均震源机制解。
The average focal mechanism of the swarm area has been inversed from the spatial distribution of the polarities of 2177 P-wave initial motions in the Jaishi swarm.
这次微震群属于冲击地压型矿震，与煤矿开采及回采工程活动有关，属于偶发的局部应力释放。
The event is ore earthquake of rock burst type related to coal mine exploitation and mining activity, the micro-earthquake swarms belong to occasional local stress releasing.
五原震群地震波形改变可能是由于地下介质流体成分增多柔性增强，由脆性向柔性过渡的原因。
The reason why seismic wave forms of Wuyuan swarm change might be transition of underground medium from brittleness to flexibility that increases duo to increase of fluid component.
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.
所以，如何判定前兆震群和充分利用前兆震群预报地震和监视未来地震活动有待更深入的研究和探讨。
So, how to determine precursory clustering earthquake and how to fully utilize it to forecast earthquake and to monitor earthquake activity need to be deep studied and probed.
除上述特点外，还观测到大震发生前一、二年至数月，在距未来震中不太远处(百公里)常发生前兆震群。
Besides, it is also observed that precursory earthquake swarms, appear several months to one or two years before the impending large earthquakes at a not too far distance (about 100 KMS).
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 existing of earthquake swarm, S wave shadow in some seismic stations and gradually uplifting of surface suggest a magma system beneath these volcanoes.
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。
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.
策展人也很力挺这群艺术家，由此可见为何这些艺术家能声震海内外。
The curators also support this group of artists, so we arrive to the fact why these artists are presented frequently abroad and within the country as well.
一群群孩子在草坪上堆雪人，打雪仗，掷雪球。那欢乐的喊声都快把树枝上的积雪震落了小来。
Groups sof children on the lawn snowmen, snowball fights, snowball throwing objects. Almost joyful shout that the snow on the branches of small to.
一群群孩子在草坪上堆雪人，打雪仗，掷雪球。那欢乐的喊声都快把树枝上的积雪震落了小来。
Groups sof children on the lawn snowmen, snowball fights, snowball throwing objects. Almost joyful shout that the snow on the branches of small to.
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