The Seismicity of South Australia

Abstract

The overall picture of the seismicity of South Australia has been made clearer in recent years by information from a small network of seismograph stations operated by the University of Adelaide. Much of the activity is concentrated along the Flinders Ranges from south of Gladstone to Hawker with further activity extending southwards along the Mt Lofty‐Olary arc to Kangaroo Island, and north to Leigh Creek. Another active region occurs on Eyre Peninsula. All South Australian earthquakes up to the end of May 1967, with instrumentally determined epicentres, are listed and shown on a map, and the area within which an earthquake of magnitude 2–5 could be located using the present network is shown. Magnitudes are given based on a local scale which arose out of the Richter scale for Southern California and which uses maximum amplitudes from Benioff short‐period seismographs. Magnitude frequency relationships are also shown.