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。
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。
through analyzing and processing the data of the small earthquakes in west yunnan since 1970, the definitions of the earthquake swarm and the precursor swarm in the area have been given.
对1970年以来滇西地区中小地震资料进行了分析,给出了滇西地区震群及前兆震群的定义;
it wasn」t until the phenomenon was captured in photographs, taken during the matsushiro earthquake swarm in japan between 1965 and 1967, that the seismological community acknowledged their occurrence.
直到1965——1967年日本松代的多次地震,这种现象才被用相机记录下来,地震学界由此承认了这种现象的存在。
this earthquake swarm caused damages to varying degrees in shanxi, hebei and inner mongolia, and life, property and economic construction suffered great losses.
这次震群活动使山西、河北和内蒙遭到了不同程度的破坏,使人民生命财产和经济建设受到严重损失。
a conspicuous earthquake swarm appeared in germany-czechoslovakia border region.
德国—捷克边界地区发生一次小震群活动。