® © 1109 About M/s Cowan reached the water above the submerged crater and obtained soundings showing a depth of 14 fathoms, oF approximately 25 meters. 3 3 3 ¢ Several weeks after shot time, the crater was surveyed by Holmes and Jarver, but the date vere not worked up at the time of writing. ‘The crater width ws sub- . c : stantially es mentioned above, but a maxima depth of 150 feet was recorded z. near the sero point. » It seems a reasonable conjecture that the crater depth dose scale within 2 cs the gross uncertainties of geologic structure which, in thesselves, probably & a affect the deyth by factors of 3 or more, ‘The rock structure was sonevhat - ‘ weaker ca Klugelab than on Reiriru, and was broken to s considerable depth, < which may not stabilise for scuetine ~ perhaps weeks cr months. See Mesguremnts Firet l), Ghe anslytie eclution was agylied to date. from an early Mastuan filn a taken by W580; daved on Fussel’s neasurements, the yield was computed as a 580 Mf. Detatis of the fireball metserements are given inOgle's prelinin- a i q ary report, wer Progam 3. BEST AVAILABLE COPY the KOK wenyon will providean ideel case for stuty of fireball growth, aperior¢ven to Iuster~Insy 08 Tabler Bo.4, As predicted in 14-121, : 3 and sdeequent papers, tads rate of grovth involves considerable sxcunt of : , fine structure, Gee to the early radiative phase, the mass effect of the boub é a end variations in gaunai). ; = laxities of thefirgballresultinmengured ecatter, which tenis to cbecure E a thefine structures. Earlyinepection of the KINOftrebalicurve indicates that, becmupe of the very high yield to mssratio, the fireball 1s extremely 7 P q regular, and scatter of meneuresents sufficiently smell, that fine details in a SNL : 3 On most weapons, the mass effect surface irrega-