b'Geophysics in the surveysNewsGeoscience Australia: NewsGeoscience Australia, in collaboration with the GeologicalSouthern Stuart Corridor (NT) AEM surveys which total17 000 Surveys of Western Australia, South Australia, Northern Territory,line km. Upcoming releases include surveys from Howards East Queensland, New South Wales, Victoria and Tasmania starts(NT), Daly River (NT) and Surat-Galilee (Queensland).the year with a packed geophysical acquisition schedule in the pursuit of world-class continental pre-competitive datasets ofTasmanian Tiersever-increasing quality and type (Figure 1). As of January 2020, some highlights include: The proposed 66 000 line km Tasmanian Tiers airborne magnetic and radiometric survey took a step closer in late 2019 with the AusAEM signing of a project agreement between Geoscience Australia and the principal funder: Mineral Resources Tasmania. While The Australian airborne EM surveying programme (AusAEM)some operational challenges limit the optimum acquisition over northern Australia was suspended in October 2019 at 72%window to 34 months per annum, it is hoped that the complete whilst the aircraft undertook work for the United Statesacquisition can still go ahead this calendar year.Geological Survey (USGS). Surveying is expected to re-commence in February with acquisition of the remaining19 000 line kmUpdated national gravity compilation(including industry in-fill) to be completed in 12 months.Planning for AusAEM20 (see attached update from the GSWA)Geoscience Australia is pleased to announce the release of is well under way with tendering anticipated to commence inthe first product from the (re)compilation of Australias gravity March and the first tranche of acquisition expected mid-2020. coverage, 2019 (Figure 2). From the metadata attached to the electronic catalogue release:Groundwater AEM This grid represents Free Air Anomaly values on the ground and ocean surface for the Australian region. The grid cell size is 15 Various helicopter airborne EM surveys flown by SkyTEM forarc seconds, or approximately 400 metres. The data are given in groundwater studies have been publicly released and areunits of ms-2, also known as "gravity units", or gu. The gravity available through Geoscience Australias eCAT portal. Of notedata are referenced to the Australian Absolute Gravity Datum are the East Kimberley (Ord-Keep rivers region, WA and NT) and2007 (AAGD07). The onshore gravity values were sourced from Figure 1.2018 -2020 geophysical surveyscompleted, in progress or planned by Geoscience Australia in collaboration with State and Territory agencies.17 PREVIEW FEBRUARY 2020'