Shortly after 8 p .m. (Eastern Australian Standard Time ) on June 11 th, 1947, there occurred the third earthquake shock of notable magnitude in Queensland and the first to be recorded by seismographs within the State.
The only previous shocks of sufficient magnitude to cause widespread comment were those of June 7th, 1918, and of April 12th, 1935, The Gayndah Earthquake. The little available information concerning the former was set out by Hedley (1925), and a full account of the latter was given by Bryan and Whitehouse (1938) and referred to by Bryan (1936).
The tremor of June 11 th, 1947, was considerably less in intensity than either of the earlier ones.