Fault traces Australian quakes



Surface rupture caused by earthquakes is extremely rare in stable continental environments such as the Northern Territory of Australia. However, the Tennant Creek earthquakes of January 22, 1988, rank among the largest known onshore Australian earthquakes, whose surface damage can be seen by these photographs and the cover photograph.

The top picture shows the main surface scarp of the Tennant Creek earthquakes. The view is east, and the throw of nearly 1 m (ruler in center of photograph is 30 cm) is south-over-north. Elsewhere on the rupture the scarp took on a more ridgelike morphology, often accompanied by extensive Assuring.