THE BAJOOL EARTHQUAKE SEQUENCE OF 1991, AND IMPLICATIONS FOR THE SEISMICITY OF CENTRAL QUEENSLAND

The township of Bajool, situated 30 km south of Rockhampton, Queenslan d, experienced two minor earthquakes, each of Richter magnitude 2.9 on 10 June 1991. The foci were located 7km north of Bajool, at a depth o f less than 10 km. The felt intensity in Bajool was generally IV-V, wi th minor damage occurring to several houses. There were several foresh ocks and four aftershocks. The events may represent reactivation of a thrust fault, close to its junction with an inferred transform fault, the Fitzroy River Fault. These events demonstrate that the quiescence of central Queensland is apparent only, and that the recently installe d University of Central Queensland Regional Network will provide a use ful contribution to the understanding of earthquakes occurring along a passive continental margin.