:.. Event Name Yuba Accidental release of radioactivity Date (GCT).- ca 06/05/63 Tunnel WeaponsRelated Low detected onsite only Operational release of radioactivity detected off site Yucca 04/28/58 Pacific Balloon Weapons Effects Yukon Operation Dominic 05/08/62 Christmastsland area Airdrop WeaponsRelated Yuma 05/27/56 Enewetak Tower WeaponsRelated Zaza 09/27/67 NTS Shaft WeaponsRelated 20 to 200 kt Zebra 05/14/48 Enewetak Tower Weapons Related 18 kt Zinnia 05/17/72 NTS Shaft Weapons Related Less than 20 kt Zucchini 05/15/55 NTS Tower Weapons Related 28 kt Zuni 05/27/56 Bikini Surface WeaponsRelated 3.5 MT North 12 degrees 37 minutes, East 163 degrees 01 minute DoD Event--Operation Newsree! -104- intermediate