Outback SA Landscape Permanently Changed by Recent Earthquake

An earthquake that struck the remote Amata community in South Australia's Anangu Pitjantjatjara Yankunytjatjara (APY) Lands has left a significant mark on the landscape, creating a visible rupture in the ground that researchers believe could be key to understanding seismic events.

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The rocks on the western side have been lifted up about half a metre or so relative to the rocks on the eastern side.

The magnitude-5.5 quake, which occurred in early April, caused a rupture stretching several kilometers. University of Melbourne researchers, including Professor Mark Quigley, observed that the land surface was visibly stretched, with one side lifted about half a meter relative to the other. Professor Quigley noted, "It's permanently changed the landscape there," highlighting the profound geological impact.

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It's permanently changed the landscape there.

This event, while powerful, occurred far from populated centers, unlike the devastating 1989 Newcastle earthquake which had a similar magnitude but caused widespread destruction and loss of life. Geoscience Australia senior seismologist Jonathan Bathgate confirmed that while the seismic energy released was comparable, the remote location meant the impact was vastly different. The ongoing research, a collaboration between the University of Melbourne and Geoscience Australia, aims to leverage the unique opportunity presented by this surface rupture to conduct detailed geological analyses. This study will help unravel how geology influences earthquake damage patterns and improve our ability to predict future seismic activity, offering valuable insights that might not be obtainable from seismometers alone.

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It's the same size earthquake, it just happens to be in quite a remote part of the country rather than near a populated centre.