Seismic sources

Current research is directed towards observing and studying seismic sources in Australia and on global scale, since moderate size or large earthquakes are rare in Australia. We have been using regional moment tensor inversion for recent significant Australian earthquakes, although the lack of knowledge of crustal and upper mantle structure in regions without historical seismicity has hindered the progress so far. We are using receiver functions in conjunction with teleseismic waves and other established techniques to better understand structural effects and calibrate Green's functions for the moment tensor inversion. We have also been working on improving continental-wide Green's functions for reliable source parameter estimation of earthquakes surrounding Australia. This is a work in progress.

Apart from that, we are interested in anomalous seismic radiation and puzzling focal mechanisms, such as those occurring in volcanic environment. We have been using a full moment tensor representation and different computational methods to reveal statistically significant non-double-couple components and model complex finite sources. Australia and its surroundings is an exciting environment for such studies, because of a great variety of physical mechanisms responsible for earthquakes.

Seismic sources

Image gallery

Seismic sources

Updated:  26 April 2017/Responsible Officer:  RSES Webmaster/Page Contact:  RSES Webmaster