There are about 10 times as many quakes for every decrease in Richter magnitude by one unit.

里氏震级每降低一个单位，地震发生的数量就会增加10倍。

youdao

There are about 10 times as many quakes for every decrease in Richter magnitude by one unit.

里氏震级每降低一个单位，地震发生的数量就会增加10倍。

youdao