由于P波和S 波以不同但相当恒定的速度传播，它们到达的间隔与到震源或初始破裂点的距离成比例地增加。
Because P and S waves travel at different but fairly constant speeds, the interval between their arrivals increases in proportion to the distance from the earthquake focus, or initial rupture point.
震源有20英里深、强度7.0级。
The earthquake was more than 20 miles deep and had a magnitude of 7.0, the USGS said.
据报道，此次地震震源深度4公里。
The fresh quake is reported to have a depth of 4-kilometers.
地质学者认为断层是震源在地表的表现。
Geologist thinks that fault is the surface expression of focus.
该震源位于宫城县沿岸深度约40公里处。
The epicenter was about 40 kilometers under the sea off the coast of Miyagi prefecture.
地震的概念、震中、震源。
可控震源施工中质量控制的重点是震源状况。
震中地震的位置，直接以上的震源在地球表面。
The epicenter of an earthquake is the location directly above the hypocenter on the surface of the earth.
震级为6.2，震源在市中心下约5方公里的深度。
With a magnitude of 6.2, it occurred at a depth of about 5 kilometers beneath the center of the city.
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.
据我国地震台网的初始破裂点的是所谓的重点或震源。
An earthquake's point of initial rupture is called its focus or hypocenter.
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.
据报道，震中距离巴东海岸30英里，震源深度约53英里。
Its epicentre was reported to be about 30 miles offshore from Padang, at a depth of about 53 miles.
这个十年对很多行业来说是动荡的十年，而震源则来自互联网。
It's been a tumultuous time of change for many industries, much of it driven by the Internet.
其统计特性可成功地用于压制随机噪音，不受震源子波的影响。
The statistical characteristic can be used to suppress random noises successfully and to avoid the influence of source wavelets.
科学家说，如果这次地震的震源中心更深，将不会造成严重影响。
Scientists said if the quake had been centered deeper down, the damage would not have been as severe.
本文使用遗传算法对均匀弹性介质进行波速和震源函数的联合反演。
The seismic velocity and source function of homogeneously elastic media are inversed jointly by adopting Hybrid GA.
通过数值计算结果表明，波速和震源函数的理论值与反演值比较吻合。
Numerical experiments show that the theoretical values of the seismic velocity and source function are matched well with the inversed ones.
通过对这些记录进行同样的计算，研究人员能够准确计算出这些小地震的震源位置。
By performing the same calculations on those records, the researchers could work out exactly where the shocks originated.
震源反演的数值算例表明，该方法是切实可行的，并具有一定的稳定性。
The numerical example of source inversion shows this method feasible and quite stable.
我在日本经历了很多地震但从未像今天这样- - -不能靠近震源中心。
I have been in plenty of earthquakes Japan and never experienced anything like this - and we were not even close to the epicentre.
智利地震震源和地球轴心线的角度更加小，也产生了更大规模的板块移动。
The fault that caused the Chilean quake also dips into the Earth at a steeper angle, which meant it moved more mass.
在震源深度附近的介质中，局部水平错动可达4公里左右，上地幔顶部在此隆起。
The local horizontal dislocation reaches about 4 km in the medium at the focal depth, where the upper mantle rises.
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.
多震层内震源断层具有区域性特点，不同地区震源断层可能具有不同的孕震机制；
Seismic source faults are characterized by regional variation and may have different earthquake generating mechanisms for different region.
但是，平原国家也会经常感觉到地震，因为从震源发出的震波往往可以传出上千里。
But quakes may often be felt in level country, too, because the waves which come from the center of a quake run often for thousands of miles.
但是，平原国家也会经常感觉到地震，因为从震源发出的震波往往可以传出上千里。
But quakes may often be felt in level country, too, because the waves which come from the center of a quake run often for thousands of miles.
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