Chapter 2—The Nuclear Testing Program « 2] Figure 2-4—Locations of Tunnei Tests in Rainier and Aqueduct Mesas Aqueduct Mesa _ Ul2p \ Ute2t Topographic edge — of Mesa iy 5 U12n Rainier Mesa U12b U12e @ Test 'ocation Tunneis 1 000 m mS 0 “4 Ne 3,000 ft Yt2g SOURCE: Modified from Detense Nuclear Agency. ANNOUNCEMENTOF NUCLEARTESTS 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 signing of the LTBT, however, have not been announced. Information concerning those tests is classified. The yields of announced tests are pres- ently reported only in the general categories of either less than 20 kilotons, or 20 to 150 kilotons. The DOE’s announcementpolicy is that a test will be pre-announcedin the afternoon 2 days before the test if it is determined that the maximum credible yield is such that it could result in perceptible ground motion in Las Vegas. The test will be post an- nounced if there is a prompt release of radioactive matenal or if any late-time release results in