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Operation Toggle was a series of 28 nuclear tests conducted in 1972 and 1973. All but
Rio BlancoProject Rio Blanco was an underground nuclear test that took place on May 17, 1973 in Rio Blanco County, Colorado, approximately 58 km northwest of Rifle....
took place at the
Nevada Test SiteThe Nevada National Security Site , previously the Nevada Test Site , is a United States Department of Energy reservation located in southeastern Nye County, Nevada, about northwest of the city of Las Vegas...
. These tests followed the
GrommetOperation Grommet was a series of 34 nuclear tests conducted at the Nevada Test Site in 1971 and 1972 including one in Alaska in 1971. These tests followed the Emery series and preceded Toggle....
series and preceded
ArborOperation Arbor was a series of 19 nuclear tests conducted at the Nevada Test Site in 1973 and 1974. These tests followed the Toggle series and preceded Operation Bedrock.-Individual Tests:...
. The individual blasts were:
| Name | Date | Size |
| July 20 |
< 20 kilotons |
| ATARQUE |
July 25 |
< 20 kilotons |
| CEBOLLA, CUCHILLO, SOLANO |
August 9 |
3×low |
| OSCURO |
September 21 |
20 to 200 kilotons |
| DELPHINIUM |
September 26 |
15 kilotons |
| AKBAR |
November 9 |
< 20 kilotons |
| ARSENATE |
November 9 |
< 20 kilotons |
| CANNA-UMBRINUS, -LIMOGES |
November 17 |
< 20 kilotons |
| TULOSO |
December 12 |
< 20 kilotons |
| SOLANUM |
December 14 |
< 20 kilotons |
| FLAX-SOURCE |
December 21 |
< 20 kilotons |
| FLAX-TEST, -BACKUP |
December 21 |
< 20 kilotons |
| ALUMROOT |
February 14 |
< 20 kilotons |
| MIERA |
March 8 |
20 to 200 kilotons |
| GAZOOK |
March 23 |
< 20 kilotons |
| NATOMA |
April 5 |
< 20 kilotons |
| ANGUS, VELARDE |
April 25 |
< 20 kilotons |
| COLMOR |
April 26 |
< 20 kilotons |
| STARWORT |
April 26 |
90 kilotons |
| MESITA |
May 9 |
< 20 kilotons |
| RIO BLANCO Project Rio Blanco was an underground nuclear test that took place on May 17, 1973 in Rio Blanco County, Colorado, approximately 58 km northwest of Rifle....
1, 2, 3 |
May 17 |
3×33 kilotons |
| CABRESTO |
May 24 |
< 20 kilotons |
| KASHAN |
May 24 |
< 20 kilotons |
| DIDO QUEEN |
June 5 |
< 20 kilotons |
| ALMENDRO |
June 6 |
200 KT to 1 MT |
| POTRILLO |
June 21 |
20 to 200 kilotons |
| PORTULACA |
June 28 |
20 to 200 kilotons |
| SILENE |
June 28 |
< 20 kilotons |