- Announced United States Nuclear Tests -- By Event Event Name: _ — Date (GCT) ©. Location.» a ana Type. ope aoe Purpose nogBaD -. Yield Range... I Glencoe Operational release of radioactivity 03/22/86 NTS Shaft WeaponsRelated 20 to 150 kt Gnome 12/10/61 Carlsbad Shaft Plowshare 3 kt Goldstone 12/28/85 NTS Shaft WeaponsRelated 20 to 150 kt Gorbea 01/31/84 NTS Shaft Weapons Related 20 to 150 kt Grable 05/25/53 NTS Airburst Weapons Related 15 kt Grape A 12/17/69 NTS Shaft Weapons Related 20 to 200 kt Grape B 02/04/70 NTS Shaft WeaponsRelated 20 to 200 kt Greeley 12/20/66 NTS Shaft WeaponsRelated 870 kt Greys 11/22/63 NTS Shaft WeaponsRelated Intermediate Grunion 10/11/63 NTS - Shaft Weapons Related Low Guanay 09/04/64 NTS Shaft Weapons Related Less than 20 kt Gum Drop DoD Event 04/21/65 NTS Tunnel Weapons Effects Less than 20 kt Gundi 11/15/62 NTS Shaft Weapons Related Low Gundi Prime 05/09/63 NTS Shaft WeaponsRelated Low HA (High Altitude) 04/06/55 NTS Airdrop WeaponsEffects 3 kt Haddock 08/28/64 NTS | Shaft WeaponsRelated Less than 20 kt Halfbeak 06/30/66 NTS Shaft Weapons Related 365 kt Hamilton 10/15/58 NTS Tower WeaponsRelated 1.2 tons detected off site Multiple-purpose experimentin salt Formed cavity 160-170ft. diameter, 60-80 ft. high , Accidental release of radioactivity detected off site Fired from 280mm gun -75-