Time series seismograph data recorded from Australian National Seismograph Network (ANSN) observatories in Australia, islands in the Pacific, Southern and Indian Ocean's and the Australian Antarctic Territory. <b>Value: </b>This data is used for earthquake monitoring, measurement, detection and location of earthquakes, which is valuable for emergency response, hazard modelling and mitigation. The dataset is also used to meet a subset of Australia's obligations to the Comprehensive Nuclear-Test-Ban Treaty Organisation (CTBTO) to fulfil Australia's commitment to nuclear explosion monitoring. <b>Scope: </b>Observatories in Australia, islands in the Pacific, Southern and Indian Ocean's and the Australian Antarctic Territory

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The gravity data collection contains both onshore and offshore data acquired on geophysical surveys conducted by Commonwealth, State & NT Governments and the private sector. <b>Value: </b>Gravity used to infer (model) the presence and position of different rock types in the subsurface. Used in resource assessment <b>Scope: </b>Australia continent and some data from marine surveys in region

The collection includes 17,247 measurements of temperature and temperature gradients collected down 5513 individual wells. This information formed the basis for the 'OZTemp Interpreted Temperature at 5km Depth' image of Australia <b>Value: </b>These observations are used to assess heat flow which can be used to infer deep geologic structure, which is valuable for exploration and reconstructions of Australia's evolution <b>Scope: </b>Nationwide collection corresponding to accessible boreholes and published measurements

Survey Data captured after severe natural hazard events covering a range of hazards with specific attributes. This observational information is used as input data to assessing vulnerability to natural hazard, but is not made available in its raw form. <b>Value: </b>Used to assess impacts from natural disasters and thereby reduce future risks. <b>Scope: </b>Australia, data from Papua New Guinea, Indonesian province of West Sumatra (Padang) and New Zealand

Parametric dataset of earthquakes in the Australian region, with magnitudes greater than 2.5. Includes records of instrumentally recorded earthquakes and explosions, and earthquake parameters inferred from historic documents. Threshold magnitude of completeness varies spatially and temporally. <b>Value: </b>This data has historic value, and is used in assessment of earthquake hazard, risk and potential impacts from future events. <b>Scope: </b>A catalogue of known historical earthquakes in Australia and adjacent regions.

Descriptions of and measurements from field sites and samples from geological (including regolith) surveys. <b>Value: </b>Used to constrained surface geology, important in resource exploration and understanding physical environment. <b>Scope: </b>Mapping surveys mainly in Australia, but also in Antarctica, Oceania and south-east Asia.

This data collection is comprised of radiometric (gamma-ray spectrometric) surveys acquired across Australia by Commonwealth, State and Northern Territory governments and the private sector with project management and quality control undertaken by Geoscience Australia. The radiometric method measures naturally occurring radioactivity arising from gamma-rays. In particular, the method is able to identify the presence of the radioactive isotopes potassium (K), uranium (U) and thorium (Th). The measured radioactivity is then converted into concentrations of the radioelements K, U and Th in the ground. Radiometric surveys have a limited ability to see into the subsurface with the measured radioactivity originating from top few centimetres of the ground. These surveys are primarily used as a geological mapping tool as changes in rock and soil type are often accompanied by changes in the concentrations of the radioactive isotopes of K, U and Th. The method is also capable of directly detecting mineral deposits. For example, K alteration can be detected using the radiometric method and is often associated with hydrothermal ore deposits. Similarly, the method is also used for U and Th exploration, heat flow studies, and environmental mapping purposes such as characterising surface drainage features. The instrument used in radiometric surveys is a gamma-ray spectrometer. This instrument measures the number of radioactive emissions (measured in counts per second) and their energies (measured in electron volts (eV)). Radiometric data are simultaneously acquired with magnetic data during airborne surveys and are a non-invasive method for investigating near-surface geology and regolith.

Mapped and projected extents of geology and geologic features in Australia, including: surface geology, regolith geology, solid geology, chronostratigraphic surfaces, and province boundaries. The database includes igneous, sedimentary and structural characteristics, age limits, parent and constituent units, relations to surrounding provinces, and mineral and petroleum resources. based on field observations interpretations of geophysics and borehole data. <b>Value:</b> Data used for understanding surface and near surface geology. The data can be used for a variety of purposes, including resource exploration, land use management, and environmental assessment. <b>Scope:</b> Australia and Australian Antarctic Territory

The national Marine Sediments collection is a scientific resource that includes information for samples collected within the Australian marine jurisdiction, including location, water depth, sampling method and sample descriptions. Data are provided from quantitative analyses of the samples, such as grain size, mud, sand, gravel and carbonate concentrations. Additional analyses on some samples include mineralogy, age determinations, geochemical properties, and physical attributes for down-core samples including bulk density, p-wave velocity, porosity and magnetic susceptibility. Images and graphics are presented, where available. MARS currently holds >40,000 sample and sub-sample records, and approximately 200,000 records describing the characteristics of these samples. New data are being added as they become available. <b>Value: </b>Seabed sediment data is used to characterise the surface geology of the sea floor, important in resource exploration, marine zone management and understanding the physical environment. <b>Scope: </b>Samples were collected from Australia's marine jurisdiction, including the Australian Antarctic Territory. >40,000 sample and sub-sample records, and approximately 200,000 records describing the characteristics of these samples.

Data used to generate the National Seismic Hazard Assessments (NSHA). Data includes: original and modified earthquake catalogues, earthquake rate models, probabilistic seismic hazard outputs. The most recent assessment was completed in 2018 and can be viewed on Geoscience Australia's <a href="http://www.ga.gov.au/about/projects/safety/nsha">National Seismic Hazard Assessment (NSHA) Internet Page</a> <b>Value: </b> Data used to generate the NSHA <b>Scope: </b>Continental scale