NORSAR BOYAl NORWEGIAN COUSWCToR SCIENTIFIC AND INDUSTRIAL RESEARCH f-i*>

CCondnue on reverse side If necessary and identity by block number) Analysis on a regional basis of the NORSAR seismic bulletin data for the three years from April 1972 to March 1975 shows that there has been no significant tf^"/^^J?^^ detectability during this time period. The detectability has been examined using" the least squares ^\^^' ^! least squares incremental method and the °-^h^ e mental method. The results are fairly consistent, although ^ K DD FORM 1 JAN 73 1473 EDITION OF I NOV 65 IS oaSOLETE ')'" . §£) 7 SECURITY CLASSIFICATION OF THIS PAGE f^Wien Dal« EnTered;