8dee75cb-b575-427f-8aba-73e457dc46c2 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2026-03-29T05:40:04 creation ISO 19115 2016 GA310 South West Margin 2D MSS, magnetic line data 8dee75cb-b575-427f-8aba-73e457dc46c2 Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. These line dataset from the GA310 South West Margin 2D MSS were acquired for Geoscience Australia in 2008/2009 as part of the Australian Government's Offshore Energy Security Program. This survey acquired a range of pre-competitive geological and geophysical data that included seismic reflection, gravity, magnetic and swath bathymetry measurements, as well as seafloor dredge samples. A total of 26,000 line-kilometres of magnetic and gravity data were acquired during this survey. {"type": "Polygon", "coordinates": [[[105.0, -36.9], [117.9, -36.9], [117.9, -19.0], [105.0, -19.0], [105.0, -36.9]]]} 105.0 117.9 -36.9 -19.0 EARTH SCIENCES GA310 GEOPHYSICS Magnetism and Palaeomagnetism Published_External SW margin South West Margin line magnetic marine shipborne vector Download the data [68.4 MB] documentDigital Download the data [68.4 MB] application/x-netcdf