AusPass is a service dedicated to the acquisition, management, and distribution of passive seismological data in Australia.

Most of Earth’s volcanism is concentrated at tectonic plate boundaries, where plates move away from one another to create mid-ocean ridges, or where one plate slides beneath another to form a subduction zone. However, an important and widespread class of volcanism occurs within plates, or across plate boundaries....

The W-phase is a ultra-long period seismic wave that arrives as early as the first-arriving P-wave. It’s early arrival, low amplitude and stability w.r.t. details of earth structure make it ideal for rapid determination of source characteristics especially for large, tsunamigenic earthquakes. We are exploring the...

Earth is a chemically heterogeneous body. While mantle convection can be approximated as a thermally driven process, recent studies indicate that chemical heterogeneities may play an important role in governing the form and planform of mantle dynamics. Additionally, a growing body of geochemical observations argue...

Mantle convection is the principal control on Earth's thermal, chemical and geological evolution. It is central to our understanding of the origin and evolution of tectonic deformation, the thermal and compositional evolution of the mantle and, ultimately, the evolution of Earth as a whole. Plate tectonics and...

Free oscillations (also called normal modes) are vibrational patterns of the Earth. Normal modes sense the long-wavelength structures of Earth’s interior depending on the type and mode of vibration. For example, 13S2, a spheroidal mode with radial order 13 and angular order 2, samples the Earth along its radius...

Until recently, the non-dispersive shallow water wave equation has generally been thought to be adequate for modeling of deep-ocean tsunamis. Even though dispersion is obvious at trans oceanic distances, the effects on maximum tsunami height are small, and since height is normally a good criterion on which to base...

ARC Discovery Project 2013
Signal enhancement exploiting multiple arrays of seismic recorders will provide information on fine scale structure in the Earth that cannot be directly imaged, yet is vital for reconciling geophysical and geochemical understanding. Novel methods linking adaptive stacking, 3-...

One of the most fundamental gaps in our understanding of mantle convection lies in the dynamics of upwelling mantle flow (i.e. mantle plumes) and the signature of such flow at Earth's surface. While mantle plumes have been extensively studied, certain aspects of their evolution remain poorly understood.

Mantle convection is the `engine' that drives our dynamic Earth. It is the principal control on Earth's thermal, chemical and tectonic evolution. The mantle transition zone plays a critical role in this fundamental process, by controlling the passage of material between Earth's upper and lower mantle.

To better understand how large tsunamis are generated, it is important to be able to accurately model the sea level signals they generate. A number of researchers have identified systemic discrepancies between observed and modelled tsunami wave speeds for two recent major tsunamis, the 2010 Maule and 2011 Tohoku...

The amplification of seismic waves in sedimentary basins is an important aspect of seismic hazard that is often poorly understood. This is particularly important in Indonesia, where most major cities are built on basins filled with young alluvial sediments and/or volcanic tuff.

Seismology of the deep Earth refers to studying the Earth's lower mantle and core using various seismological techniques. Seismology is the powerful tool to study the Earth's interior because the waves generated during earthquakes sample different depths and regions in the Earth's interior and carry the information...

Accurate moment tensor solutions are crucial to developing a reliable seismic hazard assessment for Indonesia. Not only are these source parameters relied on for describing the style of faulting and earthquake recurrence in a particular region, they are also critical in developing the Ground Motion Prediction...

Seismologists combine the so-called receiver functions and surface wave data to improve the general understanding of crustal and upper mantle structure in various regions of the world. An important humanitarian objective of obtaining improved structural models is better understanding of the seismicity and hazard...