学科：地震地质学 词目：震源距 英文：hypocentral distance，focal length 释文：震源距是指某一指定点至地震震源的距离。
地质监测数据显示最新一次地震震源距地表6.2英里。
Data from the geological survey indicated that the epicenter of the latest earthquake was 6.2 miles beneath the earth's surface.
竖向反应谱及竖向与水平向加速度反应谱比是周期的函数、并与场地条件及震源距相关。
The results show that the V/H peak acceleration ratios are reduced as the distance of site to the fault is increased, and the vertical response spectra and …
但是震源仅仅距地面5千米，是上次的一半，距离震中仅仅10千米，而上次则是30千米。
But at 5km (3 miles) down, its focus was at half the depth—and the epicentre a mere 10km from the city compared with 30km last time.
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