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Operation Hardtack UMBRELLA, 1958

Umbrella fired June 8, 1958, was a DOD sponsored weapons effects test for a medium depth underwater explosion. An underwater crater 3000 feet across and 20 feet deep was produced. Operation Hardtack I was a series of 35 nuclear tests conducted by the United States in 1958 at the Pacific Proving Grounds. In 1958 the arms race proceeded apace, with the enormous weapons production infrastructure and both weapons labs operating at full speed. Partly this burst of testing activity was due to building pressure for an imminent test moratorium, leading the weapons labs to rush as many device types to the test range as possible. A total of 35.6 megatons were shot during this series. The lab tests centered on ICBM and SLBM missile warheads and high yield strategic bombs. The DOD conducted high altitude multi-megaton tests to study their usefulness for ABM (anti-ballistic missile) warheads, and discovered the high-altitude EMP (electromagnetic pulse) effect in the process. Effects tests of underwater explosions were also conducted.

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Title:

Operation Hardtack UMBRELLA, 1958

Caption:

Umbrella fired June 8, 1958, was a DOD sponsored weapons effects test for a medium depth underwater explosion. An underwater crater 3000 feet across and 20 feet deep was produced. Operation Hardtack I was a series of 35 nuclear tests conducted by the United States in 1958 at the Pacific Proving Grounds. In 1958 the arms race proceeded apace, with the enormous weapons production infrastructure and both weapons labs operating at full speed. Partly this burst of testing activity was due to building pressure for an imminent test moratorium, leading the weapons labs to rush as many device types to the test range as possible. A total of 35.6 megatons were shot during this series. The lab tests centered on ICBM and SLBM missile warheads and high yield strategic bombs. The DOD conducted high altitude multi-megaton tests to study their usefulness for ABM (anti-ballistic missile) warheads, and discovered the high-altitude EMP (electromagnetic pulse) effect in the process. Effects tests of underwater explosions were also conducted.

Credit:

Album / CTBTO/Science Source

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Image size:

3175 x 4050 px | 36.8 MB

Print size:

26.9 x 34.3 cm | 10.6 x 13.5 in (300 dpi)

Keywords:

1958 • 20 XX TWENTIETH CENTURY • 20TH CENTURY • 20TH • A-BOMB • AMERICA • AMERICAN • ATOM BOMB • ATOMIC BOMB RESEARCH • ATOMIC BOMB TEST • ATOMIC BOMB • ATOMIC DEVICE • ATOMIC RESEARCH • ATOMIC TEST • ATOMIC TESTING • ATOMIC WEAPON • BLAST • BLASTING • CELEBRITIES • CELEBRITY • DEPLOYED UNDERWATER • DETONATE • DETONATING • DETONATION • ENEWETAK ATOLL • ENIWETOK ATOLL • EVENT • EVENTS • EXPLODE • EXPLODING • EXPLOSION • FAMOUS • HARDTACK 1 • HARDTACK I • HARDTACK UMBRELLA • HARDTACK • HISTORIC • HISTORICAL • HISTORY • HYDROGEN BOMB TEST • HYDROGEN BOMB • HYDROGEN DEVICE • HYDROGEN WEAPON • IMPORTANT • JUNE 8 • JUNE 8TH • MARSHALL ISLANDS • NOTABLE • NUCLEAR BOMB RESEARCH • NUCLEAR BOMB TEST • NUCLEAR BOMB • NUCLEAR DEVICE • NUCLEAR TEST • NUCLEAR TESTING • NUCLEAR WEAPON • OCEAN, PACIFIC • OPERATION HARDTACK 1 UMBRELLA • OPERATION HARDTACK 1 • OPERATION HARDTACK UMBRELLA • OPERATION HARDTACK • PACIFIC OCEAN • PACIFIC PROVING GROUND • PARASOL • RALIK CHAIN • RESEARCH & DEVELOPMENT • RESEARCH AND DEVELOPMENT • RESEARCH • SCIENCE • SIEGE • SITE • TECHNOLOGICAL • TECHNOLOGY • THERMONUCLEAR BOMB TEST • THERMONUCLEAR BOMB • THERMONUCLEAR DEVICE • THERMONUCLEAR RESEARCH • THERMONUCLEAR TEST • THERMONUCLEAR TESTING • THERMONUCLEAR WEAPON • TWENTIETH CENTURY • UMBRELLA • UMBRELLAS • UNITED STATES • US • USA • WELL-KNOWN