Chapter 2—-The Nuclear Testing Program © 21 Figure 2-4—Locations of Tunnel Tests in Rainier and Aqueduct Mesas Aqueduct Mesa Ui2p \ U12t Topographic edge — of Mesa Ny °t/ Ut2an Rainier Mesa U12b U12e @ Test 'ocation Tunnels 1000 — 0. -————_——> 3900 U12g SOURCE: Modified from Defense Nuciear Agency. ANNOUNCEMENTOF NUCLEAR TESTS ently reported only in the general categories of eithe The existence of each nuclear test conducted prior to the signing of the LTBT on August 5, 1963, has been declassified. Many tests conducted since the pre-announcedin the afternoon 2 daysbefore the tes if it is determined that the maximum credible yiel: is such that it could result in perceptible groun announced. Information concerning those tests is classified. The yields of announced tests are pres- material or if any late-time release results i Signing of the LTBT, however, have not been less than 20 kilotons, or 20 to 150 kilotons. Th: DOE’s announcementpolicy is that a test will b: motion in Las Vegas. The test will be post ar nounced if there is a prompt release of radioacuv