The South West seismic zone (also identified as SWSZ) is a major intraplate earthquake province located in the south west of Western Australia.
[5][6] The zone exists within an Archaean Shield structure called the Yilgarn Block.
[7] The identified geological subdivisions within this Precambrian structure do not show an obvious relation to the seismicity.
More recent events have occurred to the south in Lake Muir in 2018[9][10][11][12] and Arthur River in 2022.
[13] The zone and the explanation of it, has been titled Perthquake in the Catalyst programme on the ABC in 2001.