A magnitude 3.0 earthquake has struck the Flinders Ranges region in South Australia.
It occurred at about 4.30am (CDT) on Monday at a depth of 8km.
Geoscience Australia said on its website the quake could be felt up to 23km away.
AAP reports another earthquake, magnitude 2.6, occurred near Aberfoyle Park in southeast Adelaide at about 8.30am (CDT) on Monday.
Geoscience Australia senior seismologist Jonathan Bathgate said the Aberfoyle Park earthquake would have felt like a short and sharp jolt, lasting only a few seconds.
Earthquakes in the Flinders Ranges were quite common and hundreds occur in the area each year.
Mr Bathgate said earthquakes in the Aberfoyle Park area are uncommon: Monday's quake was one of only 13 in 30 years.