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
|
| Annie
| 17 March, 1953
| Nevada Test Site
| 16 kilotons
|
|
| Nancy
| 24 March, 1953
| Nevada Test Site
| 24 kilotons
|
|
| Ruth
| 31 March, 1953
| Nevada Test Site
| 0.2 kilotons
| Partial Misfire
|
| Dixie
| 6 April, 1953
| Nevada Test Site
| 11 kilotons
|
|
| Ray
| 11 April, 1953
| Nevada Test Site
| 0.2 kilotons
| Partial Misfire
|
| Badger
| 18 April, 1953
| Nevada Test Site
| 23 kilotons
|
|
| Simon
| 25 April, 1953
| Nevada Test Site
| 43 kilotons
|
|
| Encore
| 8 May, 1953
| Nevada Test Site
| 27 kilotons
|
|
| Harry
| 19 May, 1953
| Nevada Test Site
| 32 kilotons
|
|
| Grable
| 25 May, 1953
| Nevada Test Site
| 15 kilotons
|
|
| Climax
| 4 June, 1953
| Nevada Test Site
| 61 kilotons
|
|
