震源距 [地震] hypocentral distance
focal length
- 如果把这种仪器安装在距震源700多英里远的地方。
When the instrument is situated at more than 700 miles from the earthquake centre. - 地震发生在周六下午4:27(东部时间下午7:27)距离尤里卡城约25英里的地方,震源距地面约10英里。
The quake, which ran about 10 miles deep, hit at 4:27 p.m. (7:27 p.m. ET) Saturday, about 25 miles from Eureka. - 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.