swarm of earthquake

基本解释

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.
且在異常時間、異常形態上，5級、6級和7級地震（或6級震群）各有其特點和差異。
The existing of earthquake swarm, S wave shadow in some seismic stations and gradually uplifting of surface suggest a magma system beneath these volcanoes.
火山區存在的震群活動、部分台站觀測到的S波隂影區以及地表的緩慢擡陞等，指示火山區存在一個巖漿系統。
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.
對1970年以來滇西地區中小地震資料進行了分析，給出了滇西地區震群及前兆震群的定義；