The New South Wales Earthquake of May 22, 1961

Abstract

The earthquake of May 21, 1961 is investigated. The finally revised epicenter 1.S 34° 36' S. (geographic)., 150° 24' E., and the adopted origin time 21h 40m 01s (G.M.T.). 'The five near stations with a < 1 ° . 5 give a PI velocity of 6· 06 ± 0 . 17 km/s, and the ·eight stations with 2°<;a<;9° give a Pn velocity of S·OO±O·OS km/s. The distribution of the residuals contains no evidence of appreciable focal depth. Using the PI and Pn phases, a crustal thickness (on the assumption of a uniform crust) of 40 ± 5 km is formally indicated.