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。

youdao

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。

youdao