South Australian seismicity 1967–1971

The South Australian seismograph network has been extended since 1968 so that most earthquakes of Richter magnitude ML ≥ 1.9 within the state are located accurately. Recurrence relations have been derived which define the seismicity of the known active areas. The seismic energy release has also been used to indicate the spatial variation in earthquake activity. Epicentre trends have been noted, and may be related to hypothesized movements on intracontinental plate boundaries.