From 1 - 10 / 5997
  • This web service delivers metadata for onshore active and passive seismic surveys conducted across the Australian continent by Geoscience Australia and its collaborative partners. For active seismic this metadata includes survey header data, line location and positional information, and the energy source type and parameters used to acquire the seismic line data. For passive seismic this metadata includes information about station name and location, start and end dates, operators and instruments. The metadata are maintained in Geoscience Australia's onshore active seismic and passive seismic database, which is being added to as new surveys are undertaken. Links to datasets, reports and other publications for the seismic surveys are provided in the metadata.

  • Categories  

    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 Alice Springs Region - Simpson Desert North, NT, 2003 survey were acquired in 2003 by the NT Government, and consisted of 52000 line-kilometres of data at 400m line spacing and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

  • Categories  

    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 Tanami/Birrindudu, NT, 1997 survey were acquired in 1997 by the NT Government, and consisted of 81828 line-kilometres of data at a line spacing between 200m and 200m, and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

  • Categories  

    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 Tanami/Birrindudu, NT, 1997 survey were acquired in 1997 by the NT Government, and consisted of 81828 line-kilometres of data at a line spacing between 200m and 200m, and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

  • Categories  

    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 Tanami/Birrindudu, NT, 1997 survey were acquired in 1997 by the NT Government, and consisted of 81828 line-kilometres of data at a line spacing between 200m and 200m, and 60m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

  • Categories  

    Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This Sir Samuel Throssell Gravity Survey P201460 CSCBA267 is a complete spherical cap Bouguer anomaly grid for the Sir Samuel Throssell Gravity Survey (P201460). This gravity survey was acquired under the project No. 201460 for the geological survey of WA. The grid has a cell size of 0.00477 degrees (approximately 499m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 11659 gravity stations were acquired to produce this grid.

  • Categories  

    Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This Northern McArthur Basin Gravity Survey P201480 Complete Spherical Cap Bouguer Anomaly 267GU is a complete spherical cap Bouguer anomaly grid for the Northern McArthur Basin Gravity Survey (P201480). This gravity survey was acquired under the project No. 201480 for the geological survey of NT. The grid has a cell size of 0.00457 degrees (approximately 500m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 6898 gravity stations were acquired to produce this grid.

  • Categories  

    Digital Elevation data record the terrain height variations from the processed point-located data recorded during a geophysical survey. This West Amadeus Basin Gravity P201481 GRS80HTM is elevation data for the West Amadeus Basin Gravity Survey, 2014 (P201481). This survey was acquired under the project No. 201481 for the geological survey of NT. The grid has a cell size of 0.00471 degrees (approximately 499m). This grid contains the ground elevation relative to the ellipsoid for the West Amadeus Basin Gravity Survey, 2014 (P201481). It represents the vertical distance from a location on the Earth's surface to the ellipsoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

  • Categories  

    Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This West Amadeus Basin Gravity P201481 SCBA267GUVD is the first vertical derivative of the spheical cap Bouguer anomaly grid for the West Amadeus Basin Gravity Survey, 2014 (P201481). This gravity survey was acquired under the project No. 201481 for the geological survey of NT. The grid has a cell size of 0.00471 degrees (approximately 499m). A total of 8109 gravity stations at variable spacing between 500m and 4000m were acquired to produce this grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

  • Categories  

    Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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. This West Amadeus Basin Gravity P201481 SCBA267GU is a complete Bouguer anomaly grid for the West Amadeus Basin Gravity Survey, 2014 (P201481) survey. This gravity survey was acquired under the project No. 201481 for the geological survey of NT. The grid has a cell size of 0.00471 degrees (approximately 499m). The data are given in units of um/s^2, also known as 'gravity units', or gu. A total of 8109 gravity stations were acquired to produce this grid.