UNCLASSIFIED CLASSIFICATION REPORT DOCUMENTATION PAGE 1a. REPORT SECURITY CLASSIFICATION UNCLASSTFIED 2a. SECURITY CLASSIFICATION AUTHORITY 1b. RESTRICTIVE MARKINGS eee 2b. DECLASSIFICATION / DOWNGRADING SCHEDULE 3. DISTRIBUTION/ AVAILABILITY OF REPORT Approved for public release; distribution is unlimited, ‘4. PERFORMING ORGANIZATION REPORT NUMBER(S) 5. MONITORING ORGANIZATION REPORT NUMBER(S) WT-109 (EX) 6a. NAME OF PERFORMING ORGANIZATION 6b. OFFICE SYMBOL if Los Alamos Scientific Lab. fi (if applicable) 6c. ADDRESS (City, State, and ZIP Code) Los Alamos, NM 7a. NAME OF MONITORING ORGANIZATION : Defense Atomic Support Agency 7b. ADDRESS (City, State, and ZIP Code) Washington, DC 8a. NAME OF FUNDING / SPONSORING 8b. OFFICE SYMBOL ORGANIZATION (if applicable) 8c. ADORESS(City, State, and ZIP Code) 9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER 10. SOURCE OF FUNDING NUMBERS PROGRAM ELEMENT NO. PROJECT [NO. TASK NO. WORK UNIT ACCESSION NO. 11 TITLE (include Secunty Classification) QPFRATION GREENHOUSE, SCIENTIFIC DIRECTOR'S REPORT OF ATOMIC WEAPON TESTS AT ENIWETOK, 1951, ANNEX 1.6 ~ Blast Measurements, Part VI - Ground-shock Measurements, Section 2 - Crater Survey, Extracted Version 12. PERSONAL AUTHOR(S) - F.3. Porzel 13a. TYPE OF REPORT 13b. TIME COVERED FROM ________ 70 has had 16. SUPPLEMENTARY NOTATION [HIS report 14. DATE OF REPORT (Year, Month, Day) f1S. PAGE COUNT 531200 52 ary information removed in order sensitive m brovide an unclassified version for unlimited distribution. The work was performed by the pefense Nuclear Agency in support of the DoD Nuclear Test Personnel Review Program, 17. FIELD 18 19 COSATI CODES GROUP 3 4 SUB-GROUP to 18. SUBJECT TERMS (Continue on reverse if necessary and identify by block number) Greenhouse Blast Measurements Ground Shock Blast Effects 19. ABSTRACT (Continue on reverse if necessary and identify by block number) The purpose of this report was to study the general characteristics of the craters formed from nuclear explosions in connection with Operation Greenhouse to formulate general rules as to their size and shape. On the basis of the results, it was concluded that (1) craters on Eniwetok Atoll may be roughly described as conical sections and scaling relationships for the depth, radius, and volume are given as functions of yield; (2) crater formations are significantly affected not only by local soils but probably by the major geological structure of the Atoll; and (3) the completely different phenomenology involved in nuclear explosions in comparison with TNT denies any justification for attempting to scale to correlate the results of TNT with nuclear explosfons short of the detailed considerations of the very different early hydrodynamic history of each explosion. 20. DISTRIBUTION / AVAILABILITY OF ABSTRACT Gd UNCLASSIFIEO/UNLIMITED OC same as RPT. Fiza. NAME OF RESPONSIBLE INDIVIDUAL DD FORM 1473, 84 MarR 21. ABSTRACT SECURITY CLASSIFICATION UNCLASSIFIED 22. TELEPHONE (Include Area Code) 22¢. OFFICE SYMBOL (202) 325-7559 83 APR edition may be used until exhausted. DNA/TSCM SECURITY CLASSIFICATION OF THIS PAGE All other editions are obsolete. SA. meltARK Dee OH Clortic users