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Operation Hardtack II
Hardtack De Baca
Information
Country United States
Test site Nevada Test Site
Period April–October 1958
Number of tests 37
Max. yield 22 kilotons
Navigation
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Next test Operation Nougat

Operation Hardtack II was a series of 37 nuclear tests conducted by the United States in 1958 at the Nevada Test Site.

With test moratoriums on the horizon, American weapons labs rushed out many new designs. After the conclusion of Hardtack II, the United States announced a unilateral testing moratorium, which the Soviet Union joined until September, 1961.[1] In September 1961, the Soviet Union resumed nuclear testing, and the United States followed suit with Operation Nougat.

Test Blasts[]

Hardtack II Test Blasts
Test Name Date Location Yield Note
Otero 12 September 1958 NTS Area 3q 0.038 kilotons 1PT, failed
Bernalillo 17 September 1958 NTS Area 3h 0.015 kilotons 1PT; unsafe
Eddy 19 September 1958 NTS Area 7b 0.083 kilotons balloon shot
Luna 21 September 1958 NTS Area 3m 0.0015 kilotons 1PT; unsafe
Mercury 23 September 1958 NTS Area 12f "slight" 1PT
Valencia 26 September 1958 NTS Area 3r 0.002 kilotons 1PT
Mars 28 September 1958 NTS Area 12f 0.013 kilotons 1PT
Mora 29 September 1958 NTS Area 7b 2 kilotons balloon shot; fizzled
Hidalgo 5 October 1958 NTS Area 7b 0.077 kilotons balloon test; failed
Colfax 5 October 1958 NTS Area 3k 0.0055 kilotons 1PT; failed
Tamalpais 8 October 1958 NTS Area 12b 0.072 kilotons
Quay 10 October 1958 NTS Area 7c 0.079 kilotons tower shot
Lea 13 October 1958 NTS Area 7b 1.4 kilotons balloon shot; fizzled
Neptune 14 October 1958 NTS Area 12c 0.115 kilotons 1pt; failed
Hamilton 15 October 1958 NTS Area 5 0.0012 tower shot; fizzled
Logan 16 October 1958 NTS Area 12e 5 kilotons
Dona Ana 16 October 1958 NTS Area 7b 0.037 kilotons
Vesta 17 October 1958 NTS Area 9e 0.024 kilotons 1pt; surface shot; failed
Rio Arriba 18 October 1958 NTS Area 3s 0.090 kilotons tower shot
San Juan 20 October 1958 NTS Area 3p "zero" 1pt
Socorro 22 October 1958 NTS Area 3b 6 kilotons balloon shot
Wrangell 22 October 1958 NTS Area 5 0.115 kilotons balloon shot; fizzle
Oberon 22 October 1958 NTS Area 8a "zero" 1pt
Rushmore 22 October 1958 NTS Area 9a 0.188 kilotons balloon test; fizzle
Catron 24 October 1958 NTS Area 3T 0.021 kilotons 1pt; failed
Juno 24 October 1958 NTS Area 9f 0.0017 kilotons 1pt, surface shot
Ceres 26 October 1958 NTS Area 3b 0.0007 kilotons 1pt; tower shot
Sanford 26 October 1958 NTS Area 5 4.9 kilotons balloon shot
De Baca 26 October 1958 NTS Area 7b 2.2 kilotons balloon shot
Chavez 27 October 1958 NTS Area 3u 0.0006 kilotons 1pt; tower shot; failed
Evans 29 October 1958 NTS Area 12b 0.055 kilotons fizzle
Mazama 29 October 1958 NTS Area 9 "zero" fizzle
Humboldt 29 October 1958 NTS Area 3v 0.0078 kilotons tower shot
Santa Fe 30 October 1958 NTS Area 7b 1.3 kilotons balloon shot
Ganymede 30 October 1958 NTS Area 9g "zero" 1pt; surface shot
Blanca 30 October 1958 NTS Area 12e 22 kilotons largest test on Hardtack II
Titania 30 October 1958 NTS Area 3c 0.0002 kilotons 1pt; tower shot

See also[]

Notes[]

References[]

External links[]

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