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.

youdao

美国地质调查局最初估计，震源为142英里(230千米)，但紧接着便修正为6英里(10千米)，简直是紧贴着地面！

The Geological Survey initially said the quake had a depth of 142 miles (230km), but it later revised its estimate to say the quake was 6 miles (10 km) deep, putting it fairly close to the surface.

youdao

对于同样大小的地震，由于震源深度不一样，对地面造成的破坏程度也不一样。

An earthquake's point of initial ground rupture is called its focus or hypocenter.

youdao