according to a Wikipedia entry titled  Sedan_(nuclear_test), Sedan was a nuclear weapons  

根據維基百科標題為 Sedan_(nuclear_test) 的條目，Sedan 是

testing project conducted by the United States  on July 6, 1962, as part of Operation Plowshare,  

美國於 1962 年 7 月 6 日進行的 一項核武器 試驗項目，是

a program to investigate the use of nuclear  weapons for peaceful purposes. In this test,  

調查核武器使用情況的犁頭行動計劃 的一部分 出於和平目的。在這次測試中，

A shaft was drilled into the floor of the  Nevada desert, approximately 200 meters,  

在內華達州沙漠的地面上鑽了一個豎井，大約200米，

and then a roughly 100-kiloton thermonuclear  device was lowered into the shaft and detonated.  

然後將一個大約100千噸的熱核裝置放入豎井中並引爆。

The nuclear explosion produced a crater about the  size of a small mountain, measuring 400 meters  

核爆炸產生了一個小山大小的彈坑，直徑400米

in diameter and 100 meters deep. The crater was  created in sand-filled alluvial deposits though,  

，深100米。不過，這個隕石坑是在充滿沙子的沖積沉積物中形成的，而

not on a mountain. If the test had been conducted  in a mountain, the results may have been different

不是在山上。如果測試在山上進行，結果可能會不同