无震 meaning in English

shock-free entrance

Certain parts of the plate boundaries along subduction zones appear to be aseismic .
沿消减带的某些板块边界似乎长期无震。
One is situated in the place with frequent earthquakes occurrence , the other is in the place with no earthquakes
地震频发地区的试验场，用于验证观测项目效果；无震地区试验场，用于试验仪器的抗干扰性能和确定背景场。
Through several historical earthquake investigation cases , we found that the following aspects should be paid more attention in studying historical records of earthquakes : ( 1 ) discrimination and verification of historical records ; ( 2 ) application in evaluation of historical earthquake records ; ( 3 ) investigation of historical data without earthquakes ; ( 4 ) application in investigation of historical administration area and place name
摘要本文通过具体实例说明在查阅历史地震记载资料时应特别注意以下几个方面： ( 1 )地震历史记载的辨别； ( 2 )地震历史记载资料评价的应用； ( 3 )无震历史记载的查证； ( 4 )历史行政分区和地名考证的应用。