1. Alpine Fault: This is a major fault line located along the western coast of New Zealand and the southern coast of Australia. It runs for over 600 kilometers and separates the Australian Plate from the Pacific Plate. The Alpine Fault is responsible for several large earthquakes in the past, including the 7.8-magnitude Inangahua Earthquake of 1968 and the 7.1-magnitude Fiordland Earthquake of 2009.
2. Gippsland Basin Fault: This fault line is located offshore in the Gippsland Basin, south-east of Melbourne. It separates the Australian Plate from the Pacific Plate and is responsible for several large earthquakes in the past, including the 7.2-magnitude Strahan Earthquake of 1994.
3. New Guinea Trench Fault: This fault line is located offshore in the New Guinea Trench, north of Australia. It separates the Australian Plate from the Pacific Plate and is responsible for several large earthquakes in the past, including the 7.6-magnitude New Guinea Trench Earthquake of 1996.
4. Tasman Fracture Zone: This fault line is located offshore in the Tasman Sea, between Australia and New Zealand. It separates the Australian Plate from the Pacific Plate and is responsible for several large earthquakes in the past, including the 7.1-magnitude Macquarie Ridge Earthquake of 1989.
These are just a few examples of the major fault lines in Australia. The country is located at the boundary of the Australian and Pacific tectonic plates, which means that it is a region of high seismic activity. Earthquakes of varying magnitudes occur regularly in Australia, and some of these can cause significant damage and loss of life.