Over the last decade there has been an exponential growth in MT data acquisition over the Australian Continent through collaboration between Geoscience Australia, state and territory governments and academics. This data is resulting in a step change in our understanding of the lithosphere and basin architecture. Abstract submitted/presented at 2017 Target Conference (https://www.aig.org.au/events/target-2017/)

<div>Australia boasts a world-class resource of publicly available magnetotelluric (MT) data. Its backbone is the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) – a grid of long-period deployments spaced at ~55 km designed to image the lithospheric-scale electrical structure of the continent. Since being launched in late 2013, data have been recorded at over 1500 stations, covering approximately 50% of the Australian landmass. In addition to AusLAMP are numerous targeted, smaller-scale surveys, including profiles coincident with active seismic lines, and dense grids of broadband MT stations in regions of special interest, such as those with significant mineralisation.</div><div><br></div><div>These datasets have been made possible by significant public investment through the federal and state geological surveys and through research grants, backed by a publicly funded pool of high quality long-period and broadband instruments. Critical to the success of these datasets has been close cooperation between universities and the state and federal geological surveys. Private industry has also been involved in data collection, in supporting the push for national-scale datasets, and in co-funding some surveys. </div><div><br></div><div>On this poster we present the current status of public MT data in Australia, showcasing the expansion of the AusLAMP array and highlighting some of the key inverse models that have been produced to date. The results from several dense, targeted surveys, including in the Cloncurry region in Queensland where 969 broadband MT stations were collected on a 2 km grid, are featured. In addition, we preview upcoming work, including WA MT which will extend the coverage of gridded lithospheric-scale MT into Western Australia. We also provide information on developments in how to access the data as both time series and transfer functions, including integration of open-source geophysical software into national high-performance computing resources. Presented at the 26th Electromagnetic Induction Workshop 2024 (EMIW2024) Beppu Japan

Geoscience Australia’s geomagnetic observatory network covers one-eighth of the Earth. The first Australian geomagnetic observatory was established in 1840 in Hobart. This almost continuous 180-year period of magnetic-field monitoring provides an invaluable dataset for scientific research. Geomagnetic storms induce electric currents in the Earth, and feed into power lines through substation neutral earthing, causing instabilities and sometimes blackouts in electricity transmission systems. Power outages to business, financial and industrial centres cause major disruption and potentially billions of dollars of economic losses. The intensity of geomagnetically induced currents is closely associated with geological structure. Geomagnetic storm events across three decades have been analysed to develop a statistical model of geomagnetic storm activity in Australia and the model used to predict the intensity of geomagnetically induced currents in Australia's modern-day power grids. Modelling shows the induced electric fields in South Australia, Victoria and New South Wales caused by an intense magnetic storm that occurred in 1989. Real-time forecasting of geomagnetic hazards using Geoscience Australia’s geomagnetic observatory network and magnetotelluric data from the Australian Lithospheric Architecture Mapping Project helps develop national strategies and risk assessment procedures to mitigate space weather hazard. Abstract submitted to/ presented at 2021 Australasian Exploration Geoscience Conference -AEGC2021 (https://2021.aegc.com.au/).