Operation Toggle

Operation Toggle
Toggle Diamond Sculls tunnel test chamber
Information
CountryUnited States
Test site
  • near Rifle, Colorado
  • NTS Area 12, Rainier Mesa
  • NTS Area 19, 20, Pahute Mesa
  • NTS, Areas 1–4, 6–10, Yucca Flat
Period1972–1973
Number of tests28
Test typeunderground shaft, tunnel
Max. yield250 kilotonnes of TNT (1,000 TJ)
Test series chronology

The United States's Toggle nuclear test series was a group of 28 nuclear tests conducted in 1972–1973. These tests followed the Operation Grommet series and preceded the Operation Arbor series.

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