The magnitude 8.0 earthquake in Wenchuan on 5.12 was felt in most of China. The area of the hardest hit area was about 125,600 square kilometers. The radius of the circle of the hardest hit area was about tens of thousands of kilometers.
5.12汶川8.0级大地震，大半个中国都有震感，其中重灾区的面积约为12.56万平方千米，这个重灾区域的圆形半径约是多少万千米．
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