Adelaide's earthquake-prone nature has been a concern for decades, with the city's last major earthquake in 1954 causing significant damage and injuries. Despite its reputation as a stable climate, Adelaide is Australia's most seismically active region, with a history of tremors and a high risk of future earthquakes. The city's location on the Indo-Australian tectonic plate, which moves northeast at a rate of 7 centimeters per year, contributes to its vulnerability. The Willunga, Para, and Eden-Burnside faults, as well as others, run beneath the Greater Adelaide area, making it a hotspot for seismic activity. The University of Adelaide's Professor Alan Collins predicts another major earthquake in his lifetime, emphasizing the need for preparedness. The city's infrastructure, including the Torrens to Darlington project, must consider these active faults to ensure safety. Adelaide's history includes notable earthquakes, such as the 1897 Beachport quake, which caused significant damage and injuries, and the 2010 Mount Barker earthquake, which shook the region and was felt as far as Kangaroo Island. The city has experienced a varying number of earthquakes in recent years, with 126 earthquakes in 2024, 88 in 2023, 78 in 2022, and 52 in 2021. Geoscience Australia's seismologist, Jonathan Griffin, attributes this variability to random occurrences, but acknowledges the potential for aftershocks following moderate to large earthquakes. Adelaide's earthquake risk is considered 'low to moderate' globally but the highest among Australia's capital cities, with seismologists warning of earthquakes up to Richter Magnitude 7.5. The 1989 Newcastle earthquake, which caused 13 deaths and 160 hospitalizations, serves as a stark reminder of the potential consequences of seismic events.
