Announced United States Nuclear Tests -- By Event . Event Name. ... . . Baneberry Date (GCT) Location - AO aI Type _... Purpose. | Yield Range. a 12/18/70 NTS Shaft WeaponsRelated 10 kt Banon 08/26/76 NTS Shaft Joint US-UK 20 to 150 kt Barbel 10/16/64 NTS Shaft WeaponsRelated Less than 20 kt Barnwelt 12/08/89 NTS Shaft Joint US-UK 20 to 150 kt Barsac 03/20/69 NTS Shaft WeaponsRelated Less than 20 kt Baseball 01/15/81 NTS Shaft WeaponsRelated 20 to 150 kt Bee 03/22/55 NTS Tower WeaponsRelated 8 kt Beebalm 05/01/70 NTS Shaft WeaponsRelated Less than 20 kt Belmont 10/16/86 NTS Shaft WeaponsRelated 20 to 150 kt Benham 12/19/68 NTS Shaft WeaponsRelated 1.15 MT Bernal 11/28/73 NTS Shaft Weapons Related Less than 20 kt Bernalillo 09/17/58 NTS Shaft Safety Experiment 15 tons Bexar 04/04/91 NTS Shaft WeaponsRelated 20 to 150 kt Bighorn 06/27/62 Christmas [stand Airdrop WeaponsRelated Megaton range Bilby 09/13/63 NTS Shaft WeaponsRelated 249 kt Billet 07/27/76 NTS Shaft WeaponsRelated 20 to 150 kt Black 04/27/62 NTS Shaft WeaponsRelated Low Blackfoot 06/11/56 Enewetak Tower WeaponsRelated Accidental release of radioactivity detected off site Accidental release of radioactivity detected on site only Unstemmedhole Radioactivity not detected off site Operation Dominic First underground test reported area felt in Las Vegas, Nevada -60-