1·The time intervals between different arrivals depends on the distance from the earthquake hypocenter to the observing station.
不同波至间的时间间隔取决于从震中到观测站之间的距离。
2·When an earthquake occurs, it generates an expanding wavefront from the earthquake hypocenter at a speed of several kilometers per second.
当地震发生，它会从震源产生一个速度为数公里每秒的扩散的波。
3·The epicenter of an earthquake is the location directly above the hypocenter on the surface of the earth.
震中地震的位置，直接以上的震源在地球表面。
4·Another method is proposed to get a 3-d earthquake distribution image using dense and high precise hypocenter position data.
提出了利用密集的震源区精确地震定位结果获得该区地震分布三维图像的方法，可以反映震源区活动构造的三维形态。