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.
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.
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.
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