<div>COMET (The Centre for Observation and Modelling of Earthquakes, Volcanoes and Tectonics) uses satellite measurements alongside ground-based observations and geophysical models to study active faults and earthquakes. This talk provides an overview of COMET research products in Türkiye and Central Asia, where interseismic deformation and active faults are directly observable. It also touches on how these products highlight the complexity and difficulty of seismic hazard modelling in Australia.&nbsp;</div><div>Three COMET datasets will be discussed, which each contribute to seismic hazard models. Researchers at COMET have and continue to pioneer INSAR methods including co-seismic interferograms and time-series modelling. For example, the Türkiye (Türkiye) INSAR strain-rate map directly estimates strain-accumulation across faults, while the LICSAR portal and satellite cross-correlation methods are used to quantify co-seismic and post-seismic deformation (including after the devastating 2023 Türkiye-Syria earthquake).&nbsp;</div><div>Similar methods are applied in the Tien Shan, where active faults are identifiable in satellite imagery and elevation data, but rates of activity are uncertain and expensive to obtain through field work. Here COMET and GEM (the Global Earthquake Model) are collaborating to produce block-model informed PSHA inputs using active fault databases, GNSS, and INSAR.&nbsp;</div><div>While these methods are useful in tectonically active regions, they serve to highlight the difficulties facing Australian seismic hazard modelling where similar methods cannot be used due to low (to unobservable) tectonic strain and very long fault recurrence.&nbsp;</div> This paper was presented to the 2023 Australian Earthquake Engineering Conference 23-25 November 2023 (https://aees.org.au/aees-conference-2023/)

The Roebuck Basin and the adjoining Beagle and Barcoo sub-basins are underexplored areas on Australia’s North West Shelf that are undergoing renewed exploration interest since the discovery of oil at Phoenix South 1 in 2014 and subsequent hydrocarbon discoveries in the Bedout Sub-basin. A well folio of 24 offshore wells across the Beagle, Bedout, Rowley and Barcoo sub-basins has been compiled as part of Geoscience Australia’s hydrocarbon prospectivity assessment across the region. It consists of composite well log plots and well correlations that summarise lithology, lithostratigraphy, Geoscience Australia’s newly acquired biostratigraphic and geochemical data as well as results of petrophysical analysis. A revised sequence-stratigraphic interpretation, key petroleum system elements and drilling results are also documented. The wells dominantly target Triassic shoreward facies (Keraudren Formation) as the primary reservoir objective and Jurassic fluvial-deltaic (Depuch Formation) and/or Lower Cretaceous sandy deltaic facies as the secondary objective. The Keraudren Formation sandstones are sealed intra-formationally either by discontinuous units and/or by the regional Cossigny Member. The Jurassic Depuch Formation sandstones are sealed by regional Lower Cretaceous mudstones. Both charge and structure have been identified as critical issues in the Roebuck Basin. In the Beagle Sub-basin, seal integrity and migration pathways are also considered high risk. Well correlations have identified differences in the basin history and provide insights into the distribution of facies and other characteristics of the Jurassic and Triassic successions. <b>Citation:</b> Nguyen Duy, Rollet Nadege, Grosjean Emmanuelle, Edwards Dianne S., Abbott Steve, Orlov Claire, Bernardel George, Nicholson Chris, Kelman Andrew, Khider Kamal, Buckler Tamara (2019) The Roebuck Basin, Beagle and Barcoo Sub-basin well folio. <i>The APPEA Journal</i><b> 59</b>, 920-927.