L Announced United States Nuclear Tests -- By Event _ Event Name. Date (GCT) Location . Type Purpose Yield Range eS Akavi 12/03/81 NTS Shaft Weapons Related 20 to 150 kt Alamo 07/07/88 NTS Shaft Weapons Related Less than 150 kt Aleman 09/11/86 NTS Shaft Weapons Related Less than 20 kt Aigodones 08/18/71 NTS Shaft WeaponsRelated 20 to 200 kt Aligote 05/29/81 NTS Shaft Weapons Related Less than 20 kt Allegheny 09/29/62 NTS Shaft WeaponsRelated Low Alma Operation Dominic 06/08/62 Christmas Island area Airdrop WeaponsRelated Intermediate Almendro 06/06/73 NTS Shaft WeaponsRelated 200 to 1000 kt Alpaca Accidental release of radioactivity detected off site 02/12/65 NTS Shaft Weapons Related Less than 20 kt Alva Accidental release of radioactivity detected off site by aircraft only 08/19/64 NTS Shaft Weapons Related Less than 20 kt Amarilfo 06/27/89 NTS Shaft Weapons Related 20 to 150 kt Anacostia Device development Accidental release of radioactivity detected on site only 11/27/62 NTS Shaft Plowshare Low Anchovy Accidental release of radioactivity detected onsite only 11/14/63 NTS Shaft WeaponsRelated Low Androscoggin 10/02/62 Johnston Island Airdrop WeaponsRelated intermediate Angus 04/25/73 NTS Shaft WeaponsRelated 20 to 200 kt Annie 03/17/53 NTS Tower Weapons Related 16 kt Accidental release of radioactivity detected on site only Operation Dominic area -57-