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\subsection{Earthquakes in Australia}  Australian earthquakes occur in a `stable' continental region (SCR), so are infrequent compared to plate boundary settings. In a typical region an event is only felt on average each 5 to 10 years. The whole continent experiences about 600 recorded events each year, with 2 events of M \> 5 (Leonard, 2008). \cite{leonard2008one}.  Earthquakes in all regions of Australia are distributed over many faults, but with few longer than 100 km. It follows that there is relatively low maximum magnitude, probably Mw 7.2 to 7.5, limited by the thickness of the seismic zone and the length of active faults. The record of seismicity in continental Australia is heterogeneous. A number of distinct zones of seismicity have been defined across the Australian continent. One of these, known as the South Eastern Seismic zone, corresponds broadly with the southern part of the Eastern Highlands, extending into southwest Gippsland. Compared to other areas of Australia, seismicity in this region has been consistently elevated in the previous decade, and seems to be controlled by the arrangement of dense, highly interlinked fault networks with typically short fault lengths.