地震活跃期是指地震活动相对频繁和强烈的时期。地震活跃期是相对地震平静期而言的相对概念。对于一个地区来说，地震活跃期和地震平静区共同组成地震周期。
作者对第5个地震活跃期的特点提出了一些看法。
As the characteristics of the 5th earthquake active period, some opinions are put forward.
有地震学家表明，地球已经进入了“地震活跃期”。
Seismologists are now suggesting the Earth has entered an active seismic period.
云南有4个地震活跃期，但安达曼弧与缅甸平原却只有3个，缺失第3活跃期。
There are 4 seismic active periods in Yunnan, but only 3 in Andaman Arc and Myanmar, lacking of the third active period.
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