Operation Upshot-Knothole

   

Operation Upshot-Knothole was a series of eleven nuclear test shots conducted in 1953 at the Nevada Test Site.

Over twenty-one thousand soldiers took part in the ground exercise Desert Rock V in conjunction with the Grable shot. Grable was a 280mm shell fired from the “Atomic Cannon” and was viewed by a number of high-ranking military officials.

Followed Operation Ivy, preceded Operation Castle. The individual shots were:


Upshot-Knothole Test Blasts
Test Name Date Location Yield Note
Annie17 March, 1953Nevada Test Site16 kilotons 
Nancy24 March, 1953 Nevada Test Site24 kilotons 
Ruth31 March, 1953 Nevada Test Site0.2 kilotonsPartial Misfire 
Dixie6 April, 1953Nevada Test Site11 kilotons 
Ray11 April, 1953 Nevada Test Site0.2 kilotonsPartial Misfire 
Badger18 April, 1953 Nevada Test Site23 kilotons 
Simon25 April, 1953 Nevada Test Site43 kilotons 
Encore8 May, 1953 Nevada Test Site27 kilotons 
Harry19 May, 1953 Nevada Test Site32 kilotons 
Grable25 May, 1953 Nevada Test Site15 kilotons 
Climax4 June, 1953 Nevada Test Site61 kilotons 


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